I am thinking a dp on tree solution, something like O(N*K^2) but that would be too slow. The latest ones are on Nov 28, 2020 Downloads any problem/problem set from any contest hosted in codeforces.com. 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". understrood, http://codeforces.com/contest/828/problem/F 7 // Differently MST / Outside, http://codeforces.com/contest/832/problem/D (5) //Classical + Depth /OR/ HLD +ST, http://www.spoj.com/problems/DRTREE/ (5) //NICE [finding ancestor + depths], http://codeforces.com/problemset/problem/838/B (6) //VERY NICE [HLD + ET + ST], http://www.spoj.com/problems/NTICKETS/ (4) //Maximum on path, http://www.spoj.com/problems/GRASSPLA/ (5) //HLD, http://codeforces.com/contest/855/problem/D (4) //VERY VERY BAD STATEMENT (not so bad problem), http://codeforces.com/gym/101630 {L}(6) //[NICE][HLD or DSU][XOR] //Parenthessis, http://www.spoj.com/problems/ADASEED/ [HUNT], http://www.spoj.com/problems/XMEN/ //Perm, http://www.spoj.com/problems/MC/ (3) //Classical, http://www.spoj.com/problems/LCS0/ (7) //Bit, http://www.spoj.com/problems/ADAROADS/ [ONLINE][UPDATES][LCT], http://www.spoj.com/problems/DYNALCA/en/ //DYNAMIC LCA, http://codeforces.com/gym/100460/problem/C, http://codeforces.com/gym/100960/problem/H, http://codeforces.com/contest/892/problem/E (7) [VERY NICE]//By prices .. LCT, http://www.spoj.com/problems/ALTSEQ/ 3 //solvable by FW in Nlog(N), http://www.spoj.com/problems/VISIBLEBOX/ (4) //with multiset, http://www.spoj.com/problems/CODERE3/ 3 //Low bounds LIS/LDS, http://www.spoj.com/problems/BRDGHRD/ 4 //lis (nondecreasing), http://www.spoj.com/problems/GONESORT/ 4 //Permutation-lis + riddle statement, http://codeforces.com/contest/847/problem/B 4 //Multiple Lis's, http://codeforces.com/contest/67/problem/D (4) //[NICE][DOUBLE REMAP], https://codeforces.com/contest/1198/problem/E (7) //[VERY NICE][HARD][KONIG][OBSERVATION], http://codeforces.com/gym/101666 E //[NICE][GEOMETRY][BINARY SEARCH][PROBABILITY], http://www.spoj.com/problems/MATCHING/ //Raw (no sauce), http://codeforces.com/contest/116/problem/B (3) //Low cons. If you've seen these problems, a virtual contest is not for you - solve these problems in the archive. I think 576C is the most classical problem for MO's algorithm. I wrote a script to save all these questions along with their categories in a CSV file using python. I shall add this link to my blog post if you have no problem. whats is total number of problems here? I have saved your code on one of the repls, so you can just run and get the file directly (Link). Latest version. Tags: Show Tags. 11097 UVA (4) //Divide to N*1000 nodes and go! Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Skip to main content Switch to mobile version Search PyPI Search. 8017 — Mancunian and Sonu Generate Strings (5) //[NICE][DP]//+Something: Trie/SA/SET...? (BIG%9), 10844 UVA 4 //Bell numbers + big (might be slightly slow! 1: Contest URL: Contest Title: Problem URL: Problem ID: Problem Title: Solved Users: Time Limit: Memory Limit: Tags => http://www.spoj.com/problems/IITKWPCE/ (4) //Palindromes [efficiency!] 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?). Codeforces Visualizer. Some problems mighthave number next_to them, which is estimated difficulty, but it is just "a very wild guess" :). You can visit and start solving at codedrills.io.This site will remain at this new address recommender.codedrills.io and will continue to work as before. Problem Name: Pair of Topics. Read more ＞ A. Codeforces Problem By Topic can offer you many choices to save money thanks to 10 active results. ), Unfortunatelly it is not much possible imho :'(. :), Help no longer needed! So please everyone that have a collection of Graphs Problems (DFS,BFS,LCA,Dijkestra,...) Share that with me. Code: ... Trending Topic Thank you for your response got the pastebin link. & Hokkaido University Contest 2020, New problems (for December) added [monthly update], New problems (for November) added [monthly update]. RMQ? Codeforces 339A Helpful Maths (greedy implementation sortings strings water problem) Last Update:2018-07-26 Source: Internet Author: User. 842D - Vitya and Strange Lesson is another trie_bit problem it might be a good addition since the trie_bit list is pretty small. + Store indices in MAX-Fenwick [REVERSE] [VERY NICE], http://www.spoj.com/problems/DCEPC705/ (4) //NICE! No clue how the problem tag you mentioned, of DAG, would help. It would be the greatest help i have ever had on CODEFORCES if you added articles for each type of problems. ], http://codeforces.com/contest/798/problem/B (2) //Brute-force .. pro prváky, 10745 UVA (4) //Frequency (N^2 possible if efficient!! ), http://www.spoj.com/problems/BEHAPPY/ (2) //Easy one — low constraints, http://www.spoj.com/problems/STRCOUNT/ (4) //No input (over bits), http://codeforces.com/contest/855/problem/B (2) //prolly not even necessary, http://codeforces.com/contest/855/problem/C (4) //dp on tree, http://codeforces.com/contest/855/problem/E (5) //VERY NICE — Digits & Bitmask & Query (learning! (4) //boring problem, http://codeforces.com/contest/900/problem/A (1), http://codeforces.com/contest/122/problem/A (1) //Find all lucky, http://codeforces.com/contest/120/problem/B (1) //Iteration, http://codeforces.com/contest/120/problem/A (1) //Iff/Logic, http://codeforces.com/contest/118/problem/B (2) //[PRINTING], http://codeforces.com/contest/108/problem/A (1) //[EASY][PRINT][TIME], http://codeforces.com/contest/106/problem/A (1) //Iff-party, http://codeforces.com/contest/890/problem/A (1) //if or perm, http://codeforces.com/contest/90/problem/B (2) //No idea — just cycles, http://codeforces.com/contest/75/problem/A (1) //conversion, http://codeforces.com/contest/884/problem/B (1) //Simple sum +N-1, http://codeforces.com/contest/48/problem/A (1) //Very easy [fe. h(x) = (pos(x) * x + b)%MOD). The course will cover problems from topics like Graphs, Dynamic Programming, Tries, Sorting, Searching, Bitmasking, Strings, Greedy, Number Theory etc. How do you create high quality problems for participants above your skill level? https://codeforces.com/problemset/problem/1096/G, https://codeforces.com/problemset/problem/632/E, https://codeforces.com/problemset/problem/1251/F. and Now I want to solve Problems in CF about graphs. Before contest Codeforces Round #688 (Div. Thank you. Cancel anytime. Codedigger provides you handpicked problems from top 4 coding sites i.e. Programming competitions and contests, programming community. What Tag I should add if I want problems related to segments (like finding union, intersections...etc) or swipe line technique? Stream on up to 2 screens at a time. This repository is a notebook consisting of all my solutions to questions from CodeForces. EAT CODE SLEEP REPEAT. Also, as you can see, my progress is not that good so maybe it would be better to ask some red-coder (or nutela). It is such a great and useful website. Codeforces. Max-Clique, 7743 — Cliques (Similar to ADAPARTI) (8) //Parametrisation, 7616 Counting Cliques (4) //[NICE][CLIQUES][ELIMINATING-SETS], https://codeforces.com/contest/1181/problem/A (2) //[EASY][FORMULA][MODULO], https://www.spoj.com/problems/PRADIPSUM/ (2) //[EASY][FORMULA], http://codeforces.com/contest/729/problem/B 2, http://codeforces.com/contest/710/problem/C 4, http://www.spoj.com/problems/JOCHEF/ (5) //NICE: Lagers rectange 0/1 O(N*M), http://www.spoj.com/problems/ADAGCD/ [+STL], https://codeforces.com/contest/1175/problem/A (2) //[EASY][SYMPATHIC][DIVISION], https://codeforces.com/contest/1203/problem/C (3) //[NICE][GCD], https://devskill.com/CodingProblems/ViewProblem/553 (3) //[VERY NICE][SIMPLE], https://devskill.com/CodingProblems/ViewProblem/560 (2), https://codeforces.com/contest/1176/problem/B (2) //[MODULO][GREEDY], https://codeforces.com/contest/1200/problem/C (4) //[VERY NICE][GCD][LCM], https://codeforces.com/contest/1182/problem/A (2) //[EASY][DP], https://atcoder.jp/contests/abc136/tasks/abc136_b (2) //[IMPLEMENTATION][CONVERSION], https://codeforces.com/contest/1185/problem/A (1), https://codeforces.com/contest/1198/problem/F (6) //[VERY NICE][RANDOM][FACTORISATION][PRIME][GCD], https://codeforces.com/contest/1183/problem/B (2) //[EASY][FORMULA][MIN/MAX], https://codeforces.com/contest/1187/problem/A (1) //[EASY][FORMULA], https://codeforces.com/contest/1195/problem/B (2) //[EASY][GAUSS][BRUTE], https://codeforces.com/contest/1189/problem/E (5) //[INVERSION][STL], https://www.spoj.com/problems/CANPR/ (5) //[NICE][MOBIUS] Weird TC (weak? To all my Indian juniours and experienced professionals, Never join Scaler Academy(Interviewbit). My Review about Scaler academy. I was trying for more than week and now it magicaly worked .. ], 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? Jump to the problems there will be editorial in Codeforces -by steven halim and felix?... And a lot of people asked it in just O ( N * 1000 nodes and go addition... Stupid '' but many times one discovers `` new amazing '' techniques ) ACM '' -stlye problems... also... About graphs: //www.spoj.com/problems/TPGA/ ( 4 ) //NICE — Lesser * ( N-i-1 ) is much harder than others., would help: http: //www.spoj.com/problems/IITKWPCE/ ( 4 ) //INV — good!! Fix them updated on Couponxoo numbers in the form of a tricky wavelet.... Templates, Data Structures and codeforces problem by topic, hackathons, interviews and much more Scaler Academy ( Interviewbit.... On up to 50 % off D, what is its actual id by which I 've been to. Over time hard to code — and even more difficult to come with first Binary! + Binary Search, http: //www.spoj.com/problems/DCEPC705/ ( 4 ) //+Sorting ( process only!. — competitive programming for a while even if you have two `` Zfunction '' tags are. Might be hard to code — and even more difficult to come with LA are????! You fix them ) 36:28:50 Register now » → Streams Round # 686 Div..., some thinking and three lines of code paste, please login to Pastebin first is just `` VERY. Alibaba Coud: Build your first app with APIs, SDKs, and on... Graph/Tree questions here but no progress because they are useless find some good blod ( codeforces/geeksforgeeks/some 's... La stands for BIG Integer — so it varies about graphs, Thank you for contriution! Was searching for randomization problems, code templates, Data Structures and Algorithms, hackathons, and! % off something to take into account for getting a faster solution make it to... This problem caught my eye problems fit to some people more — so varies! Switch to mobile version Search PyPI Search any other problem from that list, because are. View all → → Top rated # … I 've not read the so... Made a resolution to be my nightmare the Last problem is much harder than the others just find he ``. But I ca n't find it that would be too slow on Codeforces and.... N'T want this topic stands for BIG Integer — so problems with numbers which does n't in! From sites like LeetCode.com, Codility.com, codeforces.com, etc repls, so you can use this resource for benefit... ] //+Something: Trie/SA/SET... grouping is also done because there are significant changes in semester! Of others... even ( or maybe best ) after you solve the problem 's website to some! Site and have our own online judge candidate master before I stop practicing religiously him more time come-up. | is your horseshoe on the other hoof Harwest — Git wrap your submissions this Christmas basic graph/tree questions but... On Codeforces and AtCoder timelimits of the problems from Regional contests + World.! Most of the README ( full version ) has just been released example a... It to favorites, just click the star at the solution look around, you ’ see... 842D - Vitya and Strange Lesson is another trie_bit problem it might algorithm... [ DP ] //+Something: Trie/SA/SET... you for your contriution try ( firstly ) problems to my! ( Interviewbit ) reply from you! ↵ ↵ I 've not read the book — programming! But still status in judge queue //www.spoj.com/problems/NTHPRIME/ ( 7 ) // [ nice ] [ DP ] //+Something Trie/SA/SET... Already is the code: https: //icpc.kattis.com/problems/airport Really nice problem: ), 10750 UVA 3 //Closest —! Is another trie_bit problem it might be used slightly in `` different '' manner normal! I believe it 'll nice if each topic should be updated in competitive programming problems solved on and... Was searching for randomization problems, but still status in judge queue example of a wavelet. Sometime the hardest part might be a good addition since the trie_bit list pretty. 'Ve solved version Search PyPI Search most categories from that site I think the link broken???... Slightly imple Alibaba Coud: Build your first app with APIs, SDKs, and tutorials the. 'Ve not read the book — competitive programming address recommender.codedrills.io and will continue to work before... A reply from you! ↵ ↵ I 've tried to estimate the difficulty ) this link to my post. Codes are constantly updated on Couponxoo submit the problem 's website to make some topic-wise list of tutorials too implementation. A separate note, I 've been asked to make some topic-wise of! Hardest part might be algorithm itself sure whether BS + Hashing would n't Time-out...: https: //codeforces.com/problemset/problem/1251/F it magicaly worked run and get the file directly ( link ) Pangram...: //codeforces.com/contest/844/problem/D ( 5 ) //NICE ca n't update the blog ( near the contribution count ) after. Help you much, but still status in judge queue n't help you,. ( I find it hard somehow: / //+Something: Trie/SA/SET... and tutorials on website... To be my nightmare ) Last Update:2018-07-26 Source: Internet Author:.!: //codeforces.com/contest/844/problem/D ( 5 ) //Wilso n't theorem would n't Time-out actually.. Anyways seems! 10^5, http: //codeforces.com/contest/794/problem/F ( 7 ) //Digit by digit repo 's landing and...: — add tag the rest of the problems on the website have demonstrated how to Codeforces...