grundy numbers codeforces
], http://www.spoj.com/problems/A_W_S_N/ (4) //BFS + TSP (path) NICE, http://www.spoj.com/problems/ADAFENCE/ [Multiple Pointers], https://codeforces.com/contest/1175/problem/C (4) //[NICE][GREEDY], https://codeforces.com/contest/1203/problem/D1 (4) //[VERY NICE][STRINGS][PREPROCESS], https://codeforces.com/contest/1203/problem/D2 (5) //[VERY NICE][STRINGS][PREPROCESS], https://codeforces.com/contest/1186/problem/C (4) //[VERY NICE][BITS][OBSERVATION], https://www.spoj.com/problems/MOZHCAN/ (5) //[VERY NICE], http://codeforces.com/gym/101864 L //Static Size [SORTING], Dev Skills-499: Closest Pair Point (4) //[NICE][GEOMETRY][STRUCTURES], http://codeforces.com/contest/919/problem/C (3) //Similar simple sweep [EASY], http://codeforces.com/contest/144/problem/C (3) //[NICE][FREQUENCY][STRINGS], http://codeforces.com/contest/895/problem/B (3) //[OR BS], http://codeforces.com/contest/84/problem/B (2) //EASY //ll, http://codeforces.com/contest/79/problem/C (4) //NICE [STRINGS][SET][COMPARE], http://codeforces.com/contest/746/problem/F 6, http://codeforces.com/contest/760/problem/D 4, http://www.spoj.com/problems/WOWSUBSTR2/ 3, http://www.spoj.com/problems/CODFURY/ 3 //easy ukazkove, http://codeforces.com/contest/769/problem/B 3 //sort + TP, http://codeforces.com/contest/814/problem/C 4 //NICE maybe some DP +/-, http://www.spoj.com/problems/CRAN04/ 4 //NICE (more or less) 3 pointers, http://www.spoj.com/problems/OPCPIZZA/ 3 //NICE [EASY] [AGAINS EACH OTHER], http://www.spoj.com/problems/ALIEN/ (3) //Classical, http://www.spoj.com/problems/HOTELS/ (3) //Classical & Easy, http://www.spoj.com/problems/KOIREP/ (4) //VERY NICE N buckedt find mid diff, http://codeforces.com/contest/6/problem/E (4) //NICE Multiset, http://codeforces.com/contest/873/problem/C (3) //NICE M times 2P tenchique, http://codeforces.com/contest/840/problem/D //Proposed by GreenGrape, https://www.codechef.com/problems/CHSTR //Proposed by Apptica, http://codeforces.com/problemset/problem/126/B, http://codeforces.com/contest/119/problem/D (7) //[VERY NICE], https://www.urionlinejudge.com.br/judge/en/problems/view/1348 (4) //[CLASSICAL][NICE][SCC], http://codeforces.com/contest/776/problem/D (5). Sometime one just find he's "stupid" but many times one discovers "new amazing" techniques). So my idea is to divide the problems in each category by the problem's website to make it easier to navigate. Could someone tell me how to do it? Randomized algo, http://codeforces.com/contest/862/problem/D (4) //NICE! ), http://www.spoj.com/problems/PAINTWAL/ (6) //VERY NICE Imho hard (opti could beat), http://www.spoj.com/problems/ADFRUITS/ (3) //Very simple (substring == subsequence), http://www.spoj.com/problems/MAIN113/ (2) //NICE but somehow too low constraints, http://www.spoj.com/problems/MAIN112/ (4) //NICE Bitmask, http://codeforces.com/contest/864/problem/E (5) //VERY NICE Sort, http://www.spoj.com/problems/NOVICE63/ (4) //NICE -On digits (binary), http://www.spoj.com/problems/TUG/ (3) //NICE + Observation {N>100 == YES}, http://www.spoj.com/problems/DOMINO1/ (4) //Used map to solve it, http://www.spoj.com/problems/NY10E/ (2) //Easy dp, http://www.spoj.com/problems/MAIN72/ (3) //Easy knapsack, http://www.spoj.com/problems/NOVICE43/ (2) //Unbelievably low constraints, http://codeforces.com/contest/598/problem/E (4) //N^5 strategy works fine [VERY NICE]. If this is your private paste, please login to Pastebin first. http://www.spoj.com/problems/DTPOLY/ (5) //DP might work too, http://www.spoj.com/problems/DTPOLY2/ (7) //Harder version of above (NICE but hell), http://www.spoj.com/problems/HC12/ (3) //NICE Sort + C(i,K-1)*A[i], http://www.spoj.com/problems/STONE2/ (4) //NICE Mostly DP [INVERSION][FACTORIAL], http://www.spoj.com/problems/MAIN8_D/ (5) //NICE Suffixes/Prefixes (same add 2^i), http://www.spoj.com/problems/ITRIX_E/ (4) //VERY NICE #Nonattacking 2-queens, http://www.spoj.com/problems/MAXSUB/ (3) //NICE Subsets made of zeroes, http://www.spoj.com/problems/SKYLINE/ (3) //Catalan numbers [weird modulo care], http://codeforces.com/contest/26/problem/D (5) //Division of two combintion numbers [NI:/], http://codeforces.com/contest/872/problem/E (6) // Prod:Sum(C(DistLines,CompSize)), https://codeforces.com/contest/1174/problem/C (4) //[VERY NICE][SIEVE], https://codeforces.com/contest/1173/problem/B (3) //[VERY NICE][MATH], https://codeforces.com/contest/1202/problem/D (4) //[NICE][MATH][GREEDY], https://codeforces.com/contest/1199/problem/E (5) //[VERY NICE! Here is the text I typically use for such kind of question so hope you'll find something in it: In first place, one need obtain knowledge in basic algorithms: There are many algorithms which are not hard, yet it is hard to do even medium (sometime easy) problems without them. ], https://www.hackerrank.com/contests/mathemagic-bits/challenges/degree-diameter-on-trees [accesable? i have never heard of it. Thank you very much. I haven't found it. Back/Front, http://codeforces.com/contest/727/problem/C (2), http://codeforces.com/contest/810/problem/D (4) //BS * 3 (same), http://codeforces.com/contest/811/problem/D (4) //BFS easy .. some ifs, http://codeforces.com/contest/835/problem/E (4) //NICE! PS: I'm sorry but there might be some duplicities. ], http://www.spoj.com/problems/RIOI_3_2/ (5) //VERY NICE (easy imple Number Theory thinking), http://www.spoj.com/problems/MAXWOODS/ (3) //NICE [EASY][GRID], http://www.spoj.com/problems/DIEHARD/ (3) //Easy prolly solvable by greedy (but dp is easier), http://www.spoj.com/problems/DCEPC810/ (4) //VERY VERY NICE Subsequence 2pointers+2bools, http://www.spoj.com/problems/EQ2/ (4) //NICE: Digit + Carry (from back) iff-party, http://www.spoj.com/problems/DCEPC501/ (3) //NICE & EASY, http://www.spoj.com/problems/NUMTSN/ (4) //NICE Thinking or Opti, http://www.spoj.com/problems/GONE/ (4) //NICE & EASY [digits], http://www.spoj.com/problems/RAONE/ (4) //NICE & EASY [digits] almost similar as above, http://www.spoj.com/problems/STRSEQ/ (4) //VERY VERY NICE Next-Function, http://www.spoj.com/problems/MYQ8/ (4) //VERY NICE 3x3 tic-tac-toe [implementation], http://codeforces.com/contest/859/problem/C (3) //Easy+Sympathic [PrefixSumOptional], http://codeforces.com/contest/859/problem/D (4) //NICE [Probabilities], http://www.spoj.com/problems/UNICA/ (4) //VERY NICE [Posibilities][Print][Classical], http://www.spoj.com/problems/KOPC12H/ (4) //NICE Digit-DP, http://www.spoj.com/problems/DRACULA/ (4) //NICE Digit-DP (Both sides) iterate by sum, http://www.spoj.com/problems/ABCPATH/ (3) //DP over dfs (maybe without dp works too? 840D - Destiny is a nice example of a tricky wavelet tree. These are really useful for beginners like me. Sprague-Grundy theorem. I was trying for more than week and now it magicaly worked .. http://www.spoj.com/problems/CHAIR/ (3) //Maybe combinatorics too? for example, graphs, geometry etc. Prime numbers Prime numbers Sieve of Eratosthenes Linear Sieve Primality tests Integer factorization Sprague-Grundy theorem. I was looking for something like that.Thanks a Lot <3. http://www.spoj.com/problems/SUBSN/ (4) //Next (NICE bad input): http://www.spoj.com/problems/BOGGLE/ (2) //EASY [MAP][STREAM], http://www.spoj.com/problems/MAIN8_E/ (4) //VERY NICE Next function, http://www.spoj.com/problems/STRMATCH/ (3) //Nice matching, yet low constraints on "N", http://www.spoj.com/problems/FINDSR/ (3) //Clever bruteforce works here (NlogN), http://codeforces.com/contest/39/problem/J (2) //Simple iteration over string, http://codeforces.com/contest/876/problem/E (4) //Compare from back + make fail-pairs, http://www.spoj.com/problems/ADAPHOTO/ [or hashing after turboanalisis], https://codeforces.com/contest/1202/problem/E (5) //[NICE][OBSERVATION][RMQ], https://codeforces.com/gym/101991/problem/E (6) //[VERY NICE][RMQ]Prolly an easier alternative, https://toph.co/p/distinctness (6) //[VERY NICE][SET][LCP][RMQ], http://codeforces.com/gym/101889 M //[VERY NICE][OBSERVATION], http://codeforces.com/gym/101840 B //[NICE][ST][BIT][LCP], http://codeforces.com/contest/129/problem/D (4) //[NICE]//Suffix Automaton / Brute Force works too, http://codeforces.com/contest/123/problem/D (5) //[NICE][RMQ][D&C], 8086 Substring Sorting (7) //[VERY NICE][RMQ][BS][PST], 7702 Castle //6 [VERY NICE][RMQ][BS][FW], 7701 Favorite music //8 [VERY NICE][RMQ][SEARCH][OPTI] //WRONG TIME-LIMIT==OPTI, https://www.urionlinejudge.com.br/judge/en/problems/view/1530 //7 [VERY NICE][RMQ][SET][OFFLINE], https://www.urionlinejudge.com.br/judge/en/problems/view/2000 (5) //Basic disubstr counting, http://www.spoj.com/problems/LCS/en/ //LCS, Gym 100923D [2015 ACM National Contest Romania Round 1], https://www.codechef.com/problems/INSQ16F, Davos and Reading [INSOMNIA] //Awesome problem but can't find link [hard] non of regular judges, https://devskill.com/CodingProblems/ViewProblem/328, http://www.spoj.com/problems/LCS2/ 7 // must be linear (SA+LCP+MQ), http://codeforces.com/contest/802/problem/I 7 //NICE! Kindly if anyone has such problems, post them too. Error, this is a private paste. Can someone explain what is the solution for this problem? I've (hopefully) updated the topic! http://codeforces.com/contest/820/problem/B 3 //Polygon angle find! Why do you have two "Zfunction" tags? -Morass- Can You say the total numbers (digit) :p of the problem listed here :D :D. Thank you so much! http://www.spoj.com/problems/ACPC10D/ (3) //NICE DAG traversal, http://www.spoj.com/problems/CPCRC1C/ (4) //Digits dp (return pair), http://www.spoj.com/problems/BORW/ (3) //Inc+Dec sequence (small array), http://codeforces.com/problemset/problem/16/E (5) //Bitmask [NICE], http://codeforces.com/problemset/problem/18/E (5) //VERY NICE {no need for second iteration}, http://codeforces.com/contest/2/problem/B (5) //NICE 2/5 are in-fact independent, http://codeforces.com/contest/4/problem/D (3) //Classical [FW works too] XY > xy, http://codeforces.com/contest/6/problem/D (4) //NICE (N^4), http://codeforces.com/contest/321/problem/E (7) //VERY NICE D&C Trick, http://codeforces.com/contest/868/problem/F (8) //VERY VERY NICE D&C Trick With MO Principal, http://codeforces.com/contest/8/problem/C (5) //NICE Masks [N*2^N], http://codeforces.com/contest/868/problem/E (8) //VERY NICE HARD on tree, http://codeforces.com/contest/10/problem/D (4) //LCIS [NICE], http://codeforces.com/contest/13/problem/C (5) //NICE [sorting][only elements from array], http://codeforces.com/contest/17/problem/C (5) //[NICE][iterative-sparse][+idea], http://codeforces.com/contest/19/problem/B (4) //Knapsack (after good look), http://codeforces.com/contest/30/problem/C (4) //Probabilities + (slight)GEO, http://codeforces.com/contest/31/problem/E (4) //[NICE], http://codeforces.com/contest/41/problem/D (4) //With printing, https://www.spoj.com/problems/CONSEC/ (4) //[NICE][OFFLINE], https://codeforces.com/gym/102006/problem/C (4) //[NICE][BRUTE-FORCE], http://codeforces.com/gym/101962/problem/J (5) //[VERY NICE][TREE-FAT][SPARSE], http://codeforces.com/contest/915/problem/F (6) //[VERY NICE][SORTING], http://codeforces.com/contest/141/problem/E (6) //[NICE][SPANNIG TREE], 7903 Pandaria (7) //[VERY NICE][DSU][SORTING][MERGE][DFS], http://codeforces.com/contest/110/problem/E (4) //[NICE][COMBINATORICS][TREE], http://codeforces.com/contest/90/problem/E (5) //[NICE][DSU-LIKE-LINKS][SIMULATION], http://codeforces.com/contest/87/problem/D (5) //[VERY NICE][SORTING][COMPRES][DFS], http://codeforces.com/contest/884/problem/E (5) //[VERY NICE][MEMORY SPARSE], http://codeforces.com/contest/60/problem/D (6) //[NICE][Pythagorean Triples][Gen over max! What's all that? Hints would probably be more appreciated though, seems like an interesting problem. http://codeforces.com/contest/37/problem/C (4) //NICE Prefix dictionary [or math], http://codeforces.com/gym/101628/problem/K (5) //[NICE][IMPLEMENTATION], 8015 Alice and Bob play Contact (5) //[VERY NICE] 1stBob, http://www.spoj.com/problems/TRYCOMP/ (4), 10860 UVA (4) //DP + Trie [nice slightly generic], http://www.spoj.com/problems/DICT/ (4) //Sample trie but slightly weak/wrong data-set, https://www.urionlinejudge.com.br/judge/en/problems/view/2810 (5) //[NICE][DOUBLE], Gym 100818E [2015-2016 ACM-ICPC Southeastern European Regional Programming Contest (SEERC 2015)]. Sprague-Grundy theorem. Anyway if you would be able to do that fast (so it would easily fit into codeforces contest) the rating might possibly probabli be somewhere between purpble to red (the range you told). Nim Schedules Schedules Codeforces - Weakness and Poorness; LOJ - Closest Distance; GYM - Dome of Circus (D) However I'm still getting TLE. :), Help no longer needed! Get comfortable writing code in either of one of these languages C, C++ or Java. http://codeforces.com/contest/811/problem/C (4) //Precalculate + DP (greedy thinking), 10817 UVA 4 //Easy but slightly implementation, 10859 UVA 4 //Nice on tree .. but for a reason small constrains, 10898 UVA 4 //Hash is lesser than 1e6 .. try everything, http://codeforces.com/contest/812/problem/B (3) //Not only DP, yet imho easiest ..many spec cases, http://codeforces.com/contest/813/problem/D (5) //VERY VERY NICE N*N (none picked between a/b), http://codeforces.com/contest/814/problem/E 5 //VERY NICE Harder imple: Combinatorics, http://codeforces.com/problemset/problem/816/E (6) //NICE Tree (hard 2C complexity), http://codeforces.com/contest/837/problem/D (5) //NICE yet kinda pain [must be iterative], http://www.spoj.com/problems/AUT/ (4) //NICE K is interesting ~ at most 1600, http://www.spoj.com/problems/GNYR04C/ (3) //Easy Nice idea [Big Low approach], http://www.spoj.com/problems/TIEROPE/ (4) //Process 2*L ~ otherwise pick BIG. Prime numbers Prime numbers Sieve of Eratosthenes Linear Sieve Primality tests Integer factorization Sprague-Grundy theorem. Congrats, I see you managed to get around 504-Gateway Time-out. Sorted by: 1. I have saved your code on one of the repls, so you can just run and get the file directly (Link). hey, Can somebody help me with this problem Ada and Zoo, I would recommend you to take peek onto Steiner's Tree -> That shall be a great start ^_^. :), That's what we're trying to do https://e-maxx-eng.appspot.com/, (And many thanks to -Morass- for contributing this list of problems to corresponding articles!). n Complexity Possible Algorithms & Techniques; 10 18 +: O(1) Math: 10 18: O(logn) Binary & Ternary Search / Matrix Power / Cycle Tricks / Big Simulation Steps / Values Reranking / Math Prime numbers Prime numbers Sieve of Eratosthenes Linear Sieve Primality tests Integer factorization Sprague-Grundy theorem. Note: it is possible to implement a Fenwick tree that can handle arbitrary minimum range queries and arbitrary updates. Since the array can contain a number repeated, the optimal choice is the data structure $\text{multiset}$. It can easily handle polynomials of size $10^5$ with small coefficients, or multiplying two numbers of size $10^6$, but at some point the range and the precision of the used floating point numbers will not no longer be enough to give accurate results. ], http://codeforces.com/contest/122/problem/C (3) //Just around 2^10 lucky [RECURSION], 7899 Mr. Panda and Strips (4) //Weak test-cases, 7671 What a Beautiful Lake (2) //Try up/down from every node, http://codeforces.com/contest/110/problem/A (1) //4 or 7, http://codeforces.com/contest/106/problem/B (2) //Cycles -_-, http://codeforces.com/contest/895/problem/A (2) //All segments [in circle], http://codeforces.com/contest/893/problem/B (2) //Try each divisor, http://codeforces.com/contest/894/problem/A (1) //3-cycles, http://codeforces.com/contest/892/problem/C (3) //Try to find "1" ASAP, http://codeforces.com/contest/102/problem/A (2) //Iterate over all triples, http://codeforces.com/contest/96/problem/B (2) //Check all, http://codeforces.com/contest/94/problem/B (1) //3cycles, http://codeforces.com/contest/887/problem/B (3) //Test all numbers, http://codeforces.com/gym/101597/problem/A (4) //[MATH][MODULO][SIMULATION], http://codeforces.com/contest/68/problem/C (5) //[VERY NICE][RECURSION][MAX COST MIN FLOW], http://codeforces.com/contest/68/problem/A (1) //Simple simulation, http://codeforces.com/contest/66/problem/B (2) //Test always whole platform, http://codeforces.com/contest/46/problem/C (2) //[2pointers][N^2 works too], http://codeforces.com/contest/47/problem/D (4) //[Implementation][DFS], http://codeforces.com/contest/51/problem/D (4) //Check all/check without 1s/2nd, http://code-festival-2017-qualc.contest.atcoder.jp/tasks/code_festival_2017_qualc_b (2), http://codeforces.com/contest/53/problem/B (3) //at most 60 possibilities, http://codeforces.com/contest/55/problem/B (3) //Try all permutations & possibilities [NICE], http://codeforces.com/contest/877/problem/B (3) //NICE [N^2][PrefixSum], LA 6623 Battle for Silver (3) //4 for-cycles inside ~ K4 search, http://codeforces.com/contest/725/problem/C 4, http://codeforces.com/contest/725/problem/E 6, http://codeforces.com/contest/724/problem/B 3, http://codeforces.com/contest/753/problem/C 7, http://codeforces.com/contest/698/problem/D 8 //with geometry, http://codeforces.com/gym/101840 F //[NICE][BS][DISTANCE], 11206 UVA (6) //4^20 (but somehow passes), 11127 UVA (4) //Simple dfs [just realize you can do so], http://www.spoj.com/problems/BOKAM143SOU/ (3) //just implement for-cycles, http://www.spoj.com/problems/BLOPER/ (4) dfs with little pruning, 13173 UVA (3) //just brute-force + branching, http://codeforces.com/contest/799/problem/D (4) //VERY NICE [only top 34 needed] trick with 2 [~20], 10890 UVA (4) //Simple brute-force times out, but with simple pruning AC (answer detection, http://codeforces.com/contest/813/problem/B (3) //All*All (BF) care for overflow! Codeforces - Almost Prime; Codeforces - Sherlock And His Girlfriend; SPOJ - Namit in Trouble; SPOJ - Bazinga! The only programming contests Web 2.0 platform, 2022-2023 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred), Iranian olampyadies PLS JOIN SaDDaS(Sadra Dashti) fan club !!!! I shall add this link to my blog post if you have no problem. is the estimate out of 10. So math but basically different approach ^_^. Codeforces 2-3- (bit DP, Trie DP, Grundy DP, 2-6-6 Carmichael Numbers (Uva No.10006) I heard it is a great book (the algorithms are well described there) so it is worth giving it a try (well you shall learn the algorithm somewhere so why not from here?). http://www.spoj.com/problems/LOOPEXP/ (4) //A000254/N! This topic stands for Big Integer so problems with numbers which doesn't fit in 264 :). As one improves (hopefully), he must start doing harder and harder problems and soon with the harder problems, he must lear also advanced algorithms: Suffix Array/HLD/Segment Trees/(and many many others) which are usually not "that" necessary for easier problems. I was searching for randomization problems, but couldn't find a randomization category here. Usually, find some good blod (codeforces/geeksforgeeks/some school's lectures/so on..). Nim - CP Algorithms; Game Theory - Competitive Programming. ), http://codeforces.com/contest/831/problem/E 4 //MAP to get ORDER FW == LIST, http://www.spoj.com/problems/SAS001/ (4) //Nice number of inversions + 2P. http://www.spoj.com/problems/DIVFACT3/ (7) // Sieve 10^8 + sqrt search, http://www.spoj.com/problems/DIVFACT4/ (8) // Prime count, http://codeforces.com/contest/776/problem/C (4) //segments div. EDIT:I forgot to mention that nowadays I am giving contests and reading blogs of people on CF and topcoder but I cannot get 100% of what author is trying to say(in editorial or blog):( Is there anything I can do or should not do at this point of time? Hello! Isn't the graph in the form of a forest, with each tree having only one cycle? Our primary focus is to establish the relationship between parsimonious proper colorings and partial Grundy colorings. i mean what is LA?? We want to compute the number of different numbers in the subtree for every node of the tree. Most have easily-reachable nice tutorials, but some do not, and some tutorials are much better than others, so I believe it'll be nice if there's like a list of high-quality tutorials per topic, along with short comments if needed. can you explain your segment Tree solution for 915E please? http://codeforces.com/gym/100112 G //Special cases and so on imple. ), 10750 UVA 3 //Closest points try all pairs. Anyway what I also think is, that it won't ensure you any of the skill-levels: There are many more thinks, which "shuffled" together makes you good at CP and the knowledge of algorithms is "only" (but it is imho important) one of the "carrier pillars". letters, http://codeforces.com/contest/638/problem/C (4) //greedy idea easy, http://codeforces.com/contest/638/problem/D (5) //spec-DAG articulatin, http://codeforces.com/contest/767/problem/C (4), http://codeforces.com/contest/781/problem/C (5), http://codeforces.com/contest/794/problem/D (5) //NICE! Good article with different variations of Nim games asked in CP; Algorithm Games - Topcoder; Staircase Nim; The Intuition Behind NIM and Grundy Numbers in Combinatorial Game Theory; Tags: game-theory. Hmm okkey not sure whether BS + Hashing wouldn't time-out actually.. Anyways SA+LCP+RMQ seems to be right solution. To review, open the file in an editor that reveals hidden Unicode characters. Recently I was learn Link Cut Tree. http://codeforces.com/contest/31/problem/D (4) //[NICE] Brute-force by recursion, http://codeforces.com/contest/36/problem/B (2) //[NICE][SIMPLE], https://www.spoj.com/problems/MOZPWS/ (4) //[NICE][IMPLEMENTATION][MQ], https://codeforces.com/gym/101972/problem/G (4) //[NICE][SWEEP WORKS TOO], http://codeforces.com/problemset/problem/514/D //+BS, http://codeforces.com/problemset/problem/872/B, https://devskill.com/CodingProblems/ViewProblem/19, http://codeforces.com/contest/713/problem/D 6, http://codeforces.com/contest/675/problem/E 5, http://www.spoj.com/problems/POSTERIN/ 5 //VERY NICE Delete all minimas, http://www.spoj.com/problems/RPLN/ (3) //RMQ only, http://www.spoj.com/problems/CITY2/ (4) //RMQ + MAP [NICE][VAGUE STATEMENT], http://www.spoj.com/problems/DIFERENC/ (4) //Solve separately (linear D&C), http://codeforces.com/contest/863/problem/E (4) //OR some Queue / sorting, http://codeforces.com/contest/5/problem/C (4) //NICE many other options, http://codeforces.com/contest/15/problem/D (5) //VERY NICE 2D RM [sliding-windw][monotone-queue], http://codeforces.com/contest/873/problem/E (5) //[NICE][Brute-Force + RMQ], http://www.spoj.com/problems/AROPE2/ 5 //same as above (+time), http://www.spoj.com/problems/ADAPANEL/ [combinatorics], 13301 Impossible Communication (4) //[CUTE][SAMPLE][OBSERVATION][EASY], http://codeforces.com/problemset/problem/427/C proposed by unofficial10, http://codeforces.com/contest/894/problem/E (5) //[NICE][DP], https://devskill.com/CodingProblems/ViewProblem/79, http://www.spoj.com/problems/TFRIENDS/ (4) //just scc size, http://www.spoj.com/problems/CAPCITY/ (4) //scc destination [WEAK TC], http://codeforces.com/contest/22/problem/E (5) //[NICE][make it strongly connected][SRC>DST], http://www.spoj.com/problems/ADABERRY/ [+TREAP], https://codeforces.com/contest/1180/problem/E (6) //[VERY NICE], https://codeforces.com/contest/1187/problem/D (5) //[VERY NICE][GREEDY][STACK], https://toph.co/p/maintain-the-queue (5) //[NICE][QUEUE], http://codeforces.com/gym/101992/problem/L (5) //[VERY NICE], http://codeforces.com/gym/101982 F //[SWEEP][NORMALIZE][NICE][XOR], http://codeforces.com/gym/101962/problem/I (4) //[BS], http://codeforces.com/gym/101801 G //Two ST [SEQUENCE], http://codeforces.com/gym/101879/problem/G (5) //Merge / Special, http://codeforces.com/gym/101741/problem/J (6) //[NICE][COMBINATORICS], http://codeforces.com/contest/914/problem/D (5) //[NICE][GCD][LOG], http://codeforces.com/contest/915/problem/E (5) //[VERY NICE][UNLIMITED], http://codeforces.com/contest/145/problem/E (5) //[NICE]//Bit swap + subsequence, http://codeforces.com/contest/911/problem/G (7) //Segment tree over queries, http://codeforces.com/contest/895/problem/E (5) //[PRECISION], http://codeforces.com/contest/52/problem/C (4) //Easy [MIN]+[INCREASE], http://codeforces.com/contest/56/problem/E (5) //[NICE][NORMALIZE][MAX], http://codeforces.com/contest/877/problem/E (5) //[VERY NICE][EULER TOUR TREE], https://devskill.com/CodingProblems/ViewProblem/283, https://devskill.com/CodingProblems/ViewProblem/315, http://codeforces.com/problemset/problem/756/C, http://codeforces.com/contest/739/problem/C (8), http://codeforces.com/contest/718/problem/C (8), http://codeforces.com/contest/750/problem/E (7), http://codeforces.com/contest/759/problem/C (7), http://codeforces.com/contest/763/problem/E (8) //VERY NICE [non-trivial], http://www.spoj.com/problems/BGSHOOT/ (5) //normalize then easy, http://codeforces.com/contest/765/problem/F (7) //VERY NICE CASCADE, http://www.spoj.com/problems/GSS1/ (5) //Idea then easy, http://www.spoj.com/problems/KQUERYO/ (5) //Seg-tree of vectors, http://codeforces.com/contest/633/problem/G (8) //EulerTree+Seg+Bitset, http://www.spoj.com/problems/NAJ0001/ (7) //10^8 int memory (and worked), http://www.spoj.com/problems/PRMQUER/ (5) //2 segment trees + sieve, http://www.spoj.com/problems/EC_DIVS/ (5) //dunno if intended, http://www.spoj.com/problems/DCEPC11I/ (5) //NICE 1,2,3,4,5,.. inc, http://www.spoj.com/problems/QUE2/ (4) //kth number, http://codeforces.com/contest/785/problem/E (6) //Seg+Treap [and faster], http://codeforces.com/contest/786/problem/B (6) //+Dijkstra, http://codeforces.com/contest/121/problem/E (7) //Dunno done by vectorisation, http://codeforces.com/contest/803/problem/G (5) //VERY NICE!! http://www.spoj.com/problems/TPGA/ (4) //NICE Lesser*(N-i-1)! Prime numbers Prime numbers Sieve of Eratosthenes Linear Sieve Primality tests Integer factorization Sprague-Grundy theorem. Well firstly, I've not read the book so not sure if my answer will be "valid". http://www.spoj.com/problems/PHT/ (2) //easy BS (NN+2N) mby math? Even though I couldn't involve all problems, I've tried to involve at least "few" problems at each topic I thought up (I'm sorry if I forgot about something "easy"). Thanks a lot! (specially heli, farzanegan, salam), Denso Create Programming Contest 2022 Winter(AtCoder Beginner Contest 280) Announcement, TLE USING VECTOR BUT NOT WHILE USING ARRAY, Third Party Rule for using ChatGPT to produce snippets, Invitation to 2022 Taiwan NHSPC Mock Contest, Invitation to CodeChef Starters 68 7th Dec (Rated till 5-stars), Best Competitive Programmer as per ChatGPT. Nim Schedules Schedules Two numbers are coprime if their greatest common divisor equals $1$ ($1$ is considered to be coprime to any number). (Ordinary Numbers).cpp Go to file Go to file T; Go to line L; Copy path Copy permalink; This commit does not belong to any branch on this repository, and may belong to a Contribute to Ishrat29/Codeforces-Solutions development by creating an account on GitHub. Thanks! Ugly numbers. (BIG%9), 10844 UVA 4 //Bell numbers + big (might be slightly slow! Also note, that codeforces stile problems might be different from "ACM"-stlye problems and also from some direct-method SPOJ problems. Can you please arrange them in groups? Instead, we need to operate with odd numbers only. Auto comment: topic has been updated by -Morass- (previous revision, new revision, compare). (26), http://codeforces.com/contest/767/problem/E (6), http://codeforces.com/contest/637/problem/B (3) //NICE pro prvaky, http://codeforces.com/contest/777/problem/B (3) // -||-, http://codeforces.com/contest/777/problem/D (3) //just go from end, http://codeforces.com/contest/779/problem/C (3) //NICE pro prvky, http://www.spoj.com/problems/SPCU/ (2) //Easy zamysleni (max int = index), http://www.spoj.com/problems/LOPOV/ (4) //sort + queue (or just queue) NICE, http://codeforces.com/contest/792/problem/E (5) //T%S<=T/S + check proper, http://codeforces.com/contest/807/problem/E (5) //NICE put asice P2 / rest greedy from small, http://codeforces.com/contest/799/problem/E (5) //Many queues but NICE, http://codeforces.com/contest/808/problem/C (3) //EASY, http://codeforces.com/contest/802/problem/B (4) //Priority by "next", http://codeforces.com/contest/813/problem/A (1) //Zahrivacka pro prvaky, 10716 UVA (4) //NICE always find closest pair, http://codeforces.com/contest/816/problem/C (3) //NICE greater
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