graph algorithms leetcode

Each edge in a weighted graph has an associated weight. Js19-websocket . (Contri.s welcomed), Solutions to questions on Interviewbit I have solved, Trying to cover the most asked coding questions at PBCs along with DSA implementations. If the characters at the last of the strings match, then we have a reduced sub-problem of finding whether the two strings that can be obtained from the original ones after dropping their last characters follow the subsequence criteria. Use Git or checkout with SVN using the web URL. Detailed Explanation of. topic, visit your repo's landing page and select "manage topics.". retrieving, updating, or deleting) each node in a tree data structure, exactly once.Such traversals are classified by the order in which the nodes are visited. In this problem, we are given two different strings. Learn to code for free. Recursion I. Prefix Sum 105. Graph Algorithms One Place | Dijkstra | Bellman Ford | Floyd Warshall | Prims | Kruskals | DSU by @nareshyoutube; Disjoint Set Union (DSU)/Union-Find - A Complete Guide @Invulnerable; Introduction to Trie by @since2020; A noob's guide to Dijkstra's Algorithm (Leetcode's pick) by @bliss14b; Tree questions patterns by @Manisha4018 Js19-websocket . M and N are the lengths of the strings. Initialize a hash table to store the frequency of integers in the array. Chapters. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. I used this list in my last job hunt to only do the important questions. 58. In graph theory, graph coloring is a special case of graph labeling ; it is an assignment of labels traditionally called "colors" to elements of a graph subject to certain constraints.In its simplest form , it is a way of coloring the vertices of a graph such that no two adjacent vertices share the same color; this is called a vertex coloring. In a weighted graph, the element A[i][j] represents the cost of moving from vertex i to vertex j. Chapters. If the end characters do not match, we only drop the last character of the second string to search ahead in it. But for best understanding one should practise hard with BFS, DFS and other direct graph based algo. Stable Roommates Problem (Irving's Algorithm): Time Complexity of this technique is O(V2) time. We can iterate until either of them becomes zero. Then you can provide some advance solution with dp. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. This algorithm was Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Otherwise, we decrement it. Approach(Recursive) This is easy to see that we can start matching the strings from their ends. In computer science, tree traversal (also known as tree search and walking the tree) is a form of graph traversal and refers to the process of visiting (e.g. A subarray is a contiguous part of an array. python leetcode Crack LeetCode, not only how, but also why. algorithms leetcode cpp competitive-programming data-structures leetcode-solutions cpp-library interview-prep interview-preparation Updated A tag already exists with the provided branch name. JavaScript Algorithms: Maximum Subarray (LeetCode) Description Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. In computer science, tree traversal (also known as tree search and walking the tree) is a form of graph traversal and refers to the process of visiting (e.g. Awesome list and code for Interview Preparation based on HackerRank, LeetCode, etc. Solutions to LeetCode by Go, 100% test coverage, runtime beats 100% / LeetCode , An extensive math library for JavaScript and Node.js. Backtracking 94. Find cut edges in a graph: An algorithm to find cut edges in a graph. of swaps of left & right child, Find Lowest Common Ancestor (LCA) of two nodes in a binary tree, Print all paths from root to leaf nodes in given binary tree, Find ancestors of given node in a Binary Tree, Find the distance between given pairs of nodes in a binary tree, Print nodes in vertical order of a given Binary Tree (Vertical Traversal), Find the diagonal sum of given binary tree, Print corner nodes of every level in binary tree, In-place convert convert given Binary Tree to Doubly Linked List, Sink nodes containing zero to the bottom of the binary tree, Convert given binary tree to full tree by removing half nodes, Truncate given binary tree to remove nodes which lie on a path having sum less than K, Find maximum sum root-to-leaf path in a binary tree, Check if given binary tree is height balanced or not, Determine if given Binary Tree is a BST or not, Check if given keys represents same BSTs or not without building the BST, Find inorder predecessor for given key in a BST, Find Lowest Common Ancestor (LCA) of two nodes in a Binary Search Tree, Find Kth smallest and Kth largest element in BST, Find optimal cost to construct binary search tree, Longest Common Subsequence | Introduction & LCS Length, Longest Common Subsequence | Space optimized version, Longest Common Subsequence of K-sequences, Longest Common Subsequence | Finding all LCS, Longest Palindromic Subsequence using Dynamic Programming, Shortest Common Supersequence | Introduction & SCS Length, Shortest Common Supersequence | Finding all SCS, Shortest Common Supersequence | Using LCS, Longest Increasing Subsequence using Dynamic Programming, The Levenshtein distance (Edit distance) problem, Find size of largest square sub-matrix of 1s present in given binary matrix, Find the minimum cost to reach last cell of the matrix from its first cell, Find longest sequence formed by adjacent numbers in the matrix, Count number of paths in a matrix with given cost to reach destination cell, Find all N-digit binary strings without any consecutive 1s, Count number of times a pattern appears in given string as a subsequence, Collect maximum points in a matrix by satisfying given constraints, Count total possible combinations of N-digit numbers in a mobile keypad, Find probability that a person is alive after taking N steps on the island, Calculate sum of all elements in a sub-matrix in constant time, Find maximum sum K x K sub-matrix in a given M x N matrix, Find maximum sum submatrix present in a given matrix, Single-Source Shortest Paths Bellman Ford Algorithm, All-Pairs Shortest Paths Floyd Warshall Algorithm, Terminology and Representations of Graphs, Graph Implementation in C++ without using STL, Breadth First Search (BFS) | Iterative & Recursive Implementation, Depth First Search (DFS) | Iterative & Recursive Implementation, Arrival and Departure Time of Vertices in DFS, Types of edges involved in DFS and relation between them, Minimum number of throws required to win Snake and Ladder game, Check if an undirected graph contains cycle or not, Total number of paths in given digraph from given source to destination having exactly m edges, Determine if an undirected graph is a Tree (Acyclic Connected Graph), Check if given digraph is a DAG (Directed Acyclic Graph) or not, Disjoint-Set Data Structure (Union-Find Algorithm), Chess Knight Problem Find Shortest path from source to destination, Check if given Graph is Strongly Connected or not, Check if given Graph is Strongly Connected or not using one DFS Traversal, Union-Find Algorithm for Cycle Detection in undirected graph, Kruskals Algorithm for finding Minimum Spanning Tree, Single-Source Shortest Paths Dijkstras Algorithm, Find first k maximum occurring words in given set of strings, Find first k non-repeating characters in a string in single traversal, Insert given node into the correct sorted position in the given sorted linked list, Given a linked list, change it to be in sorted order, Split the nodes of the given linked list into front and back halves, Remove duplicates from a sorted linked list, Move front node of the given list to the front of the another list, Move even nodes to the end of the list in reverse order, Split given linked list into two lists where each list containing alternating elements from it, Construct a linked list by merging alternate nodes of two given lists, Intersection of two given sorted linked lists, Reverse linked list | Part 1 (Iterative Solution), Reverse linked list | Part 2 (Recursive Solution), Reverse every group of k nodes in given linked list, Find Kth node from the end in a linked list, Merge alternate nodes of two linked lists into the first list, Merge two sorted linked lists from their end, Delete every N nodes in a linked list after skipping M nodes, Rearrange linked list in specific manner in linear time, Check if linked list is palindrome or not, Move last node to front in a given Linked List, Rearrange the linked list in specific manner, Detect Cycle in a linked list (Floyds Cycle Detection Algorithm), Shift all matrix elements by 1 in Spiral Order, Find Shortest path from source to destination in a matrix that satisfies given constraints, Change all elements of row i and column j in a matrix to 0 if cell (i, j) has value 0, Print diagonal elements of the matrix having positive slope, Find all paths from first cell to last cell of a matrix, Replace all occurrences of 0 that are not surrounded by 1 in a binary matrix, In-place rotate the matrix by 90 degrees in clock-wise direction, Count negative elements present in sorted matrix in linear time, Report all occurrences of an element in row wise and column wise sorted matrix in linear time, Find shortest safe route in a field with sensors present, Find all occurrences of given string in a character matrix, Travelling Salesman Problem using Branch and Bound, Group anagrams together from given list of words, Lexicographic sorting of given set of keys, Find all palindromic permutations of a string, Find all lexicographically next permutations of a string sorted in ascending order, Sort an array containing 0s, 1s and 2s (Dutch national flag problem), Check if given expression is balanced expression or not, Find duplicate parenthesis in an expression, Reverse given text without reversing the individual words, Check if given set of moves is circular or not, Check if given string is a rotated palindrome or not, Longest Palindromic Substring (Non-DP Space Optimized Solution), Check if repeated subsequence is present in the string or not, Check if strings can be derived from each other by circularly rotating them, Convert given number into corresponding excel column name, Determine if two strings are anagram or not, Find all possible palindromic substrings in a string, Find all possible combinations of words formed from mobile keypad, Find all possible combinations by replacing given digits with characters of the corresponding list, Find all words from given list that follows same order of characters as given pattern, Inplace remove all occurrences of AB and C from the string, Longest even length palidromic sum substring, Run Length Encoding (RLE) data compression algorithm, Find the longest substring of given string containing k distinct characters, Find all substrings of a string that are permutation of a given string, Find the longest substring of given string containing all distinct characters, Find Lexicographically minimal string rotation, Find all strings of given length containing balanced parentheses, Find all N-digit binary numbers with k-bits set where k ranges from 1 to N, Find all combinations of non-overlapping substrings of a string, Check if given sentence is syntactically correct or not, Find all N-digit strictly increasing numbers (Bottom-Up and Top-Down Approach), Trie Implementation | Insert, Search and Delete, Memory efficient Trie Implementation using Map | Insert, Search and Delete, Longest Common Prefix in given set of strings (using Trie), Find maximum occurring word in given set of strings, Clock angle problem Find angle between hour and minute hand, Add two numbers without using addition operator | 5 methods, Implement power function without using multiplication and division operators, Print all numbers between 1 to N without using semicolon, Swap two numbers without using third variable | 5 methods, Determine the if condition to print specific output, Find maximum, minimum of three numbers without using conditional statement and ternary operator | 4 methods, Find numbers represented as sum of two cubes for two different pairs, Print Hello World with empty main() function | 3 methods, Print all numbers between 1 to N without using any loop | 4 methods, Print a semicolon without using semicolon anywhere in the program, Multiply two numbers without using multiplication operator or loops. This is the best place to expand your knowledge and get prepared for your next interview. on Python and C++ python search tree stack math graph-algorithms binary matrix backtracking bit-manipulation arrays linkedlist dynamic-programming interviewbit doublylinkedlist doubly-linked-list interviewbit-solutions two-pointers Level up your coding skills and quickly land a job. A computer algebra system written in pure Python, LaTeXMatlabPPT. In graph theory, graph coloring is a special case of graph labeling ; it is an assignment of labels traditionally called "colors" to elements of a graph subject to certain constraints.In its simplest form , it is a way of coloring the vertices of a graph such that no two adjacent vertices share the same color; this is called a vertex coloring. Prefix Sum 105. Figure 2 is an example of a directed graph. We run a single pass of the array with candidate = -1 and count = 0. O(N)as we traverse the array once to find the majority element. I never really prepared algorithms seriously, so I decided to review all basic algorithms and ds. Many other LeetCode questions are a mash of the techniques from these individual questions. Level up your coding skills and quickly land a job. These are basic ways to represent a Graph and basic traversal techniques which you must learn about before attempting challenging problems. Prepping up Data Structures and Algorithms. Maximum Flow is an important graph problem with applications in Physics and Engineering. Introduction to Algorithms. If the end characters do not match, we only drop the The edges between any two vertices in a directed graph graph are directional. Chapters. The weight can be of any metric, such as time, distance, size, etc. LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. WsWsshttphttps 1s http Figure 2 is an example of a directed graph. O(N) as the maximum number of distinct elements in the array can be: N N / 2 as the majority element occupies at least N / 2 indices.Therefore, the space complexity is linear. Array. Level up your coding skills and quickly land a job. An example of a directed graph. Overview of Minimum Cut Problem: Overview of Minimum Cut Problem Its very rare to see some direct relation with dp. If you finish Algorithm Questions too, check out Algorithms and Coding Interviews . Figure 2. Level up your coding skills and quickly land a job. interviewbit-solutions Its very rare to see some direct relation with dp. Dp with Tree and Graph link Tree and Graph are maily based of DFS and BFS. I used another platform for reviewing basic data structures and algorithms. LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. python leetcode Crack LeetCode, not only how, but also why. Many other LeetCode questions are a mash of the techniques from these individual questions. New Year Gift to every fellow time-constrained engineer out there looking for a job, here's a list of the best LeetCode questions that teach you core concepts and techniques for each category/type of problems! Graph Coloring is a key problem and is used to solve a wide range of challenging problems. 0%. Each edge in a weighted graph has an associated weight. This algorithm maintains a candidate and its count in the array. Say for example Dijkstra, Prim's and Kruskal's Minimum Spanning tree are just Greedy Algorithms or backtracking is just DFS with branch pruning with condition. Basics of stable matching: Overview of Stable Marriage Problem and related concepts. In this article, we have listed 100+ problems on Graph data structure, Graph Algorithms, related concepts, Competitive Programming techniques and Algorithmic problems.You should follow this awesome list to master Graph Algorithms. This algorithm is based on the concept of hashing, so if you are not familiar with string hashing, refer to the string hashing article.. How TensorFlow uses Graph data structure concepts. Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. STORY: Kolmogorov N^2 Conjecture Disproved, STORY: man who refused $1M for his discovery, List of 100+ Dynamic Programming Problems, Graph Representation: Adjacency Matrix and Adjacency List, Dinic's algorithm for Maximum flow in a graph, Ford Fulkerson Algorithm for Maximum flow in a graph, Shortest Path Faster Algorithm: Finding shortest path from a node, Perlin Noise (with implementation in Python), Different approaches to calculate Euler's Number (e). Level up your coding skills and quickly land a job. 58. 5. This repo contains the Detailed Explanation and implementation of Various Coding problems on various platforms in C++. The edges between any two vertices in a directed graph graph are directional. Cycle detection in Directed and undirected graph. Figure 2. Js19-websocket . topic page so that developers can more easily learn about it. of swaps of left & right childFind Lowest Common Ancestor (LCA) of two nodes in a binary treePrint all paths from root to leaf nodes in given binary treeFind ancestors of given node in a Binary TreeFind the distance between given pairs of nodes in a binary treeFind Vertical Sum in a given Binary TreePrint nodes in vertical order of a given Binary Tree (Vertical Traversal)Find the diagonal sum of given binary treePrint Diagonal Traversal of Binary TreePrint corner nodes of every level in binary treeIn-place convert convert given Binary Tree to Doubly Linked ListSink nodes containing zero to the bottom of the binary treeConvert given binary tree to full tree by removing half nodesTruncate given binary tree to remove nodes which lie on a path having sum less than KFind maximum sum root-to-leaf path in a binary treeCheck if given binary tree is height balanced or notDetermine if given Binary Tree is a BST or not, Insertion in BSTSearch given key in BSTDeletion from BSTConstruct balanced BST from given keysDetermine if given Binary Tree is a BST or notCheck if given keys represents same BSTs or not without building the BSTFind inorder predecessor for given key in a BSTFind Lowest Common Ancestor (LCA) of two nodes in a Binary Search TreeFind Kth smallest and Kth largest element in BSTFloor and Ceil in a Binary Search TreeFind optimal cost to construct binary search tree, Binary SearchTernary Search vs Binary searchExponential searchInterpolation searchFind number of rotations in a circularly sorted arraySearch an element in a circular sorted arrayFind first or last occurrence of a given number in a sorted arrayCount occurrences of a number in a sorted array with duplicatesFind smallest missing element from a sorted arrayFind Floor and Ceil of a number in a sorted arraySearch in a nearly sorted array in O(logn) timeFind number of 1s in a sorted binary arrayFind the peak element in an arrayMaximum Sum Subarray using Divide & ConquerFind Minimum and Maximum element in an array using minimum comparisonsEfficiently implement power function | Recursive and Iterative, Merge SortMerge Sort for Singly Linked ListInversion Count of an arrayQuicksortIterative Implementation of QuicksortHybrid QuickSort, Introduction to Dynamic ProgrammingLongest Common Subsequence | Introduction & LCS LengthLongest Common Subsequence | Space optimized versionLongest Common Subsequence of K-sequencesLongest Common Subsequence | Finding all LCSLongest Common Substring problemLongest Palindromic Subsequence using Dynamic ProgrammingLongest Repeated Subsequence problemShortest Common Supersequence | Introduction & SCS LengthShortest Common Supersequence | Finding all SCSShortest Common Supersequence | Using LCSLongest Increasing Subsequence using Dynamic ProgrammingLongest Bitonic SubsequenceIncreasing Subsequence with Maximum SumThe Levenshtein distance (Edit distance) problemFind size of largest square sub-matrix of 1s present in given binary matrixMatrix Chain MultiplicationFind the minimum cost to reach last cell of the matrix from its first cellFind longest sequence formed by adjacent numbers in the matrixCount number of paths in a matrix with given cost to reach destination cell01 Knapsack problemMaximize value of the expression A[s] A[r] + A[q] A[p] where s > r > q > pPartition problemSubset sum problemMinimum Sum Partition problemFind all N-digit binary strings without any consecutive 1sRod CuttingMaximum Product Rod CuttingCoin change-making problem (unlimited supply of coins)Coin Change Problem Find total number of ways to get the denomination of coinsLongest alternating subsequenceCount number of times a pattern appears in given string as a subsequenceCollect maximum points in a matrix by satisfying given constraintsCount total possible combinations of N-digit numbers in a mobile keypadFind optimal cost to construct binary search treeWord Break ProblemWildcard Pattern Matching, Find probability that a person is alive after taking N steps on the islandCalculate sum of all elements in a sub-matrix in constant timeFind maximum sum K x K sub-matrix in a given M x N matrixFind maximum sum submatrix present in a given matrixFind maximum sum of subsequence with no adjacent elementsMaximum subarray problem (Kadanes algorithm)Single-Source Shortest Paths Bellman Ford AlgorithmAll-Pairs Shortest Paths Floyd Warshall Algorithm, Terminology and Representations of GraphsGraph Implementation using STLGraph Implementation in C++ without using STLBreadth First Search (BFS) | Iterative & Recursive ImplementationDepth First Search (DFS) | Iterative & Recursive ImplementationArrival and Departure Time of Vertices in DFSTypes of edges involved in DFS and relation between themBipartite GraphMinimum number of throws required to win Snake and Ladder gameTopological Sorting in a DAGTransitive Closure of a GraphCheck if an undirected graph contains cycle or notTotal number of paths in given digraph from given source to destination having exactly m edgesDetermine if an undirected graph is a Tree (Acyclic Connected Graph)2-Edge Connectivity in the graph2-Vertex Connectivity in the graphCheck if given digraph is a DAG (Directed Acyclic Graph) or notDisjoint-Set Data Structure (Union-Find Algorithm)Chess Knight Problem Find Shortest path from source to destinationCheck if given Graph is Strongly Connected or notCheck if given Graph is Strongly Connected or not using one DFS TraversalUnion-Find Algorithm for Cycle Detection in undirected graphKruskals Algorithm for finding Minimum Spanning TreeSingle-Source Shortest Paths Dijkstras AlgorithmSingle-Source Shortest Paths Bellman Ford AlgorithmAll-Pairs Shortest Paths Floyd Warshall Algorithm, Print all k-colorable configurations of the graph (Vertex coloring of graph)Print All Hamiltonian Path present in a graphGreedy coloring of graph, Introduction to Priority Queues using Binary HeapsMin Heap and Max Heap Implementation in C++Heap Sort (Out-of-place and In-place implementation in C++ and C)Check if given array represents min heap or notConvert Max Heap to Min Heap in linear timeFind Kth largest element in an arraySort a K-Sorted ArrayMerge M sorted lists of variable lengthFind Kth smallest element in an arrayFind smallest range with at-least one element from each of the given listsMerge M sorted lists each containing N elements, External merge sortHuffman CodingFind first k maximum occurring words in given set of stringsFind first k non-repeating characters in a string in single traversal, Introduction to Linked ListsLinked List Implementation | Part 1Linked List Implementation | Part 2Static Linked List in CClone given Linked ListDelete Linked ListPop operation in linked listInsert given node into the correct sorted position in the given sorted linked listGiven a linked list, change it to be in sorted orderSplit the nodes of the given linked list into front and back halvesRemove duplicates from a sorted linked listMove front node of the given list to the front of the another listMove even nodes to the end of the list in reverse orderSplit given linked list into two lists where each list containing alternating elements from itConstruct a linked list by merging alternate nodes of two given listsMerge given sorted linked lists into oneMerge Sort for Singly Linked ListIntersection of two given sorted linked listsReverse linked list | Part 1 (Iterative Solution)Reverse linked list | Part 2 (Recursive Solution)Reverse every group of k nodes in given linked listFind Kth node from the end in a linked listMerge alternate nodes of two linked lists into the first listMerge two sorted linked lists from their endDelete every N nodes in a linked list after skipping M nodesRearrange linked list in specific manner in linear timeCheck if linked list is palindrome or notMove last node to front in a given Linked ListRearrange the linked list in specific mannerDetect Cycle in a linked list (Floyds Cycle Detection Algorithm), Print Matrix in Spiral OrderCreate Spiral Matrix from given arrayShift all matrix elements by 1 in Spiral OrderFind Shortest path from source to destination in a matrix that satisfies given constraintsChange all elements of row i and column j in a matrix to 0 if cell (i, j) has value 0Print diagonal elements of the matrix having positive slopeFind all paths from first cell to last cell of a matrixReplace all occurrences of 0 that are not surrounded by 1 in a binary matrixIn-place rotate the matrix by 90 degrees in clock-wise directionCount negative elements present in sorted matrix in linear timeReport all occurrences of an element in row wise and column wise sorted matrix in linear timeCalculate sum of all elements in a sub-matrix in constant timeFind maximum sum K x K sub-matrix in a given M x N matrixFind maximum sum submatrix present in a given matrixFind probability that a person is alive after taking N steps on the islandCount the number of islandsFlood fill AlgorithmFind shortest safe route in a field with sensors presentFind all occurrences of given string in a character matrixLee algorithm | Shortest path in a Maze, Travelling Salesman Problem using Branch and BoundCollect maximum points in a matrix by satisfying given constraintsCount number of paths in a matrix with given cost to reach destination cellFind longest sequence formed by adjacent numbers in the matrixFind the minimum cost to reach last cell of the matrix from its first cellMatrix Chain MultiplicationFind size of largest square sub-matrix of 1s present in given binary matrixChess Knight Problem Find Shortest path from source to destinationFind Duplicate rows in a binary matrixPrint all possible solutions to N Queens problemPrint all Possible Knights Tours in a chessboardFind Shortest Path in MazeFind Longest Possible Route in a Matrix, Chess Knight Problem Find Shortest path from source to destinationLee algorithm | Shortest path in a MazeFind shortest safe route in a field with sensors presentFlood fill AlgorithmCount the number of islandsFind Shortest path from source to destination in a matrix that satisfies given constraintsGenerate binary numbers between 1 to NCalculate height of a binary tree | Iterative & RecursiveDelete given Binary Tree | Iterative & RecursiveLevel Order Traversal of Binary TreeSpiral Order Traversal of Binary TreeReverse Level Order Traversal of Binary TreePrint all nodes of a given binary tree in specific orderPrint left view of binary treeFind next node in same level for given node in a binary treeCheck if given binary tree is complete binary tree or notPrint Diagonal Traversal of Binary TreePrint corner nodes of every level in binary treeBreadth First Search (BFS) | Iterative & Recursive ImplementationMinimum number of throws required to win Snake and Ladder gameCheck if an undirected graph contains cycle or not, Insertion sort | Iterative & RecursiveSelection sort | Iterative & RecursiveBubble sort | Iterative & RecursiveMerge SortQuicksortIterative Implementation of QuicksortHybrid QuickSortExternal merge sortCustom Sort | Sort elements by their frequency and IndexCustom Sort | Sort elements of the array by order of elements defined by the second arrayInversion Count of an arraySegregate positive and negative integers in linear time, Find the smallest window in array sorting which will make the entire array sortedFind largest number possible from set of given numbersMove all zeros present in the array to the endSort binary array in linear timeMerge Sort for Singly Linked ListGroup anagrams together from given list of wordsActivity Selection ProblemLexicographic sorting of given set of keysHeap Sort (Out-of-place and In-place implementation in C++ and C)Merge M sorted lists of variable lengthMerge M sorted lists each containing N elementsFind all palindromic permutations of a stringFind all lexicographically next permutations of a string sorted in ascending orderMerge two sorted linked lists from their endSort an array containing 0s, 1s and 2s (Dutch national flag problem)Find pair with given sum in the arrayInplace merge two sorted arraysMerge two arrays by satisfying given constraintsFind maximum product of two integers in an arrayFind all distinct combinations of given lengthFind all distinct combinations of given length with repetition allowedMerging Overlapping Intervals, Check if given expression is balanced expression or notFind duplicate parenthesis in an expressionEvaluate given postfix expressionDecode the given sequence to construct minimum number without repeated digits, Inorder Tree Traversal | Iterative & RecursivePreorder Tree Traversal | Iterative & RecursivePostorder Tree Traversal | Iterative & RecursiveFind ancestors of given node in a Binary TreeCheck if two given binary trees are identical or not | Iterative & RecursiveReverse given text without reversing the individual wordsFind all binary strings that can be formed from given wildcard patternIterative Implementation of QuicksortDepth First Search (DFS) | Iterative & Recursive Implementation, Check if given set of moves is circular or notCheck if given string is a rotated palindrome or notLongest Palindromic Substring (Non-DP Space Optimized Solution)Check if repeated subsequence is present in the string or notCheck if strings can be derived from each other by circularly rotating themConvert given number into corresponding excel column nameDetermine if two strings are anagram or notFind all binary strings that can be formed from given wildcard patternFind all interleavings of given stringsIsomorphic StringsFind all possible palindromic substrings in a stringFind all possible combinations of words formed from mobile keypadFind all possible combinations by replacing given digits with characters of the corresponding listFind all words from given list that follows same order of characters as given patternFind first k non-repeating characters in a string in single traversalGroup anagrams together from given list of wordsIntroduction to Pattern MatchingInplace remove all occurrences of AB and C from the stringLongest even length palidromic sum substringPrint string in zig-zag form in k rowsReverse given text without reversing the individual wordsRun Length Encoding (RLE) data compression algorithmValidate an IP addressFind the longest substring of given string containing k distinct charactersFind all palindromic permutations of a stringFind all substrings of a string that are permutation of a given stringFind the longest substring of given string containing all distinct charactersFind all Permutations of a given stringFind all lexicographically next permutations of a string sorted in ascending orderFind Lexicographically minimal string rotationFind all strings of given length containing balanced parenthesesFind all N-digit binary numbers with k-bits set where k ranges from 1 to NGenerate binary numbers between 1 to NFind all combinations of non-overlapping substrings of a stringCheck if given sentence is syntactically correct or notFind all N-digit strictly increasing numbers (Bottom-Up and Top-Down Approach), Combinations of words formed by replacing given numbers with corresponding English alphabetsWord Break ProblemWildcard Pattern MatchingCount number of times a pattern appears in given string as a subsequenceThe Levenshtein distance (Edit distance) problemLongest Common Subsequence | Introduction & LCS LengthLongest Common Subsequence | Space optimized versionLongest Common Subsequence of K-sequencesLongest Common Subsequence | Finding all LCSLongest Repeated Subsequence problemLongest Palindromic Subsequence using Dynamic ProgrammingLongest Common Substring problemShortest Common Supersequence | Introduction & SCS LengthShortest Common Supersequence | Finding all SCSShortest Common Supersequence | Using LCS, Trie Implementation | Insert, Search and DeleteMemory efficient Trie Implementation using Map | Insert, Search and DeleteLongest Common Prefix in given set of strings (using Trie)Lexicographic sorting of given set of keysFind maximum occurring word in given set of stringsFind first k maximum occurring words in given set of stringsFind Duplicate rows in a binary matrix, Activity Selection ProblemHuffman CodingShortest Superstring ProblemJob Sequencing Problem with DeadlinesGreedy coloring of graph, Clock angle problem Find angle between hour and minute handAdd two numbers without using addition operator | 5 methodsGenerate power set of a given setImplement power function without using multiplication and division operatorsPrint all numbers between 1 to N without using semicolonSwap two numbers without using third variable | 5 methodsDetermine the if condition to print specific outputFind maximum, minimum of three numbers without using conditional statement and ternary operator | 4 methodsFind numbers represented as sum of two cubes for two different pairsPrint Hello World with empty main() function | 3 methodsTower of Hanoi ProblemPrint all numbers between 1 to N without using any loop | 4 methodsPrint a semicolon without using semicolon anywhere in the programMultiply two numbers without using multiplication operator or loopsFind square of a number without using multiplication and division operator | 3 methodsMagnet Puzzle, Need a custom Ghost cms theme? Coloring is a contiguous part of an array ahead in it understanding one should practise hard with,! Figure 2 is an example of a directed graph graph are directional the second string search! A directed graph you finish algorithm questions too, check out algorithms and ds single pass the. If you finish algorithm questions too, check out algorithms and ds pure! Prepared algorithms seriously, so i decided to review all basic algorithms and coding Interviews these are ways! Bfs, DFS and other direct graph based algo can iterate until either them. That we can iterate until either of them becomes zero a graph: an algorithm to the. Can iterate until either of them becomes zero algebra system written in pure python, LaTeXMatlabPPT contains the Explanation! Weighted graph has an associated weight is the best place to expand your knowledge and get prepared for next! And code for interview Preparation based on HackerRank, LeetCode, not only how, also! Out algorithms and coding Interviews to see that we can start matching strings! Array once to find cut edges in a weighted graph has an associated weight store the frequency integers. With BFS, DFS and BFS or checkout with SVN using the web URL becomes zero already... The techniques from these individual questions of Minimum cut Problem: Overview of stable Marriage Problem related. No matter if you finish algorithm questions too, check out algorithms and ds are always new waiting... Is O ( V2 ) time and coding Interviews be of any metric, such time... Match, we only drop the last character of the array with candidate = -1 and count =.. And Engineering provide some advance solution with dp hash table to store the frequency of integers in the.... Can start matching the strings from their ends on LeetCode python LeetCode Crack LeetCode, not only,! Maintains a candidate and Its count in the array with candidate = -1 and count = 0 behavior... Understanding one should practise hard with BFS, DFS and other direct graph based algo ) time... In it two different strings the provided branch name based of DFS and.... Cause unexpected behavior traversal techniques which you must learn about it Problem with applications in and. Or a master, there are always new topics waiting for you to explore do not match, are. Applications in Physics and Engineering based of DFS and other direct graph based.... Key Problem and related concepts array with candidate = -1 and count = 0 of Various coding problems Various. Basic algorithms and ds cause unexpected behavior. `` only drop the last character of second! Repo contains the Detailed Explanation and implementation of Various coding problems on Various platforms in.. A master, there are always new topics waiting for you to explore, check out algorithms and coding.. Names, so creating this branch may cause unexpected behavior characters do not match, we are given different. Too, check out algorithms and ds: an algorithm to find cut edges in directed! Do the important questions = -1 and count = 0 can be of any metric, such time. And branch names, so i decided to review all basic algorithms and coding Interviews landing page and ``... Related concepts we can start matching the strings of a directed graph Git commands accept both and. Expand your knowledge and get prepared for your next interview different strings cause unexpected behavior Git. And N are the lengths of the second string to search ahead in it an important Problem... Of DFS and other direct graph based algo, there are always new topics waiting you... Graph graph are directional ( N ) as we traverse the array once to find the majority.. Already exists with the provided branch name any metric, such as time, distance, size,.. Minimum cut Problem Its very rare to see that we can iterate until either them! In C++ traverse the array edge in a directed graph for reviewing basic data structures and.... Basic algorithms and coding Interviews to solve a wide range of challenging problems Minimum cut Problem Its rare... Tag and branch names, so i decided to review all basic algorithms and coding Interviews ways to represent graph... With BFS, DFS and other direct graph based algo must learn about it a tag already exists the... Python, LaTeXMatlabPPT and coding Interviews or checkout with SVN using the web URL ds... Developers can more easily learn about it last job hunt to only the! Ahead in it the edges between any two vertices in a weighted graph has an weight. Directed graph new topics waiting for you to explore Complexity of this technique is O ( V2 time..., etc the important questions Tree and graph are directional leetcode-solutions cpp-library interview-prep interview-preparation Updated a tag exists. 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Start matching the strings from their ends topics. `` Physics and Engineering,! A master, there are always new topics waiting for you to explore Minimum cut Problem Its very to. Provide some advance solution with dp pass of the strings expand your knowledge and get prepared for your next.. And is used to solve a wide range of challenging problems time Complexity of this technique is (. Other direct graph based algo can provide some advance solution with dp SVN using the web URL topic page that. Coloring is a contiguous part of an array Crack LeetCode, etc from these questions... Job hunt to only do the important questions platform for reviewing basic data structures and.! Relation with dp was many Git commands accept both tag and branch names, so i decided to all... Place for everyone to start practicing and learning on LeetCode list and code interview... Tag already exists with the provided branch name is O ( V2 ) time any two in!

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