Managed to solve it in just O(N) and N is only <= 100. 11097 UVA (4) //Divide to N*1000 nodes and go! 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). 2) 3: 252: Permutation: Codeforces: Codeforces Round #209 (Div. Can you please arrange them in groups? So in the end (omitting build part): There shall be (+/-) 2N such processes, with at most 3 RMQ questions and a few peeks to array: So this part shall be linear and hopefully shall not time-out. nope it is not. 10818 UVA (5) //Easy — but not-easy implementation: ++Dijkstra [LEX! is the estimate out of 10. Note: Gyms problems and unrated problems are only considered in number of solved problems and number of submissions. Even though many people undeestimate this, it is very important to get to phase where you can code what you know (well, it might sound stupid, but many times one know a solution one hour before end of contest, yet he ends coding 10 minutes before end when he starts his 20 minute debugging phase [and both could be significantly reduced]). I tried all basic graph/tree questions here but no progress.This blog was worth a shot and i tried graph questions but no progress. Codeforces. Also sometimes it is interesting to peek to solution of others... even (or maybe BEST) after you solve the problem. Hey -Morass- I've been trying to solve SPOJ — JUSTAPAL from the palindrome category using hashing + binsearch and then using nlogn SA + LCP + RMQ to get first and second mismatches and do some swaps. NICE & EASY, http://codeforces.com/contest/817/problem/C (3) //Check S+Constant (NICE! Atcoder Beginner Contest 189 Post-contest Discussion. ), 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. 13170 UVA (7) //heavy implementation — but NICE! Secondly some problems fit to some people more — so it varies. Actually I am looking for a good problemset on codeforces.If any user while solving problems keep their information please mention your list of problems according to topics.Basically advance data structure problems would be a big plus..Thanks in advance. The only programming contests Web 2.0 platform, AtCoder Beginner Contest 189 Announcement. More features: - Show each phase and compare it with previous one. whats is total number of problems here? http://www.spoj.com/problems/CHAIR/ (3) //Maybe combinatorics too? A2 Online Judge (or Virtual Online Contests) is an online judge with hundreds of problems and it helps you to create, run and participate in virtual contests using problems from the following online judges: A2 Online Judge, Live Archive, Codeforces, Timus, SPOJ, TJU, SGU, PKU, ZOJ, URI. https://www.hackerrank.com/contests/world-codesprint-7/challenges/elastic-rope/problem, https://devskill.com/CodingProblems/ViewProblem/20 [EASY], 3378 — Swamp Things [LA] — Maximum points on line, https://www.codechef.com/problems/ALLPOLY //[NICE] Point seeing polygon, http://www.spoj.com/problems/IITKWPCL/ //Point distance, LightOJ 1018 //Minimum # of lines through all pts [VERY NICE], UVA 12830 //Biggest rectangle without points inside, http://www.spoj.com/problems/AMR12C/ //Pt closest to all other points, http://www.spoj.com/problems/CLOPPAIR/ //Closest pair of points, http://codeforces.com/problemset/problem/600/D //Circles intersection, http://www.spoj.com/problems/CERC07C/en/ //Bounding circle, LightOJ 1130 //Circle x Rectangle intersection, http://codeforces.com/problemset/problem/610/D //Lines intersections (axes parallel), http://codeforces.com/problemset/problem/681/E //Circles intersection, http://codeforces.com/problemset/problem/793/C //Intersection ans similar, Gym 100190I [2011 ACM-ICPC East Central North America (ECNA 2011)] //Segment intersection, http://codeforces.com/gym/100917/problem/K, http://www.spoj.com/problems/SICRANO/ //Point-line distance, http://codeforces.com/problemset/problem/614/C //Point-line distance, https://www.hackerrank.com/contests/booking-hackathon/challenges/nearby-attractions/problem //Pt sphr, 11265 UVA 6 //Nice one | polygon — cut/pt-check/area, 11177 UVA 6 //BS+Polygon/Circle intersection, 11008 UVA 5 //with DP → #intersected triangles, 11012 UVA 5 //Nejvzdálenější body (Manhatton 3D), http://codeforces.com/problemset/problem/682/E 6 (biggest triangle), http://codeforces.com/contest/672/problem/C 4 //easy — just think it up, http://codeforces.com/contest/667/problem/A 2 //vzorecky, http://codeforces.com/contest/793/problem/C 5 //EASY but beware of epsilons (NICE), http://codeforces.com/contest/794/problem/B 2 //Can be done with BS, http://codeforces.com/contest/814/problem/D 5 //+DP on trees (NICE — but low geom. Can someone explain what is the solution for this problem? The link has changed. 8017 — Mancunian and Sonu Generate Strings (5) //[NICE][DP]//+Something: Trie/SA/SET...? ], 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). If there is non-positive, you need to move two negatives to the list of positives, because the product of two negatives is positive. 13 images found at www.codeforces.com Images can improve the user experience for a website by making a pag visually appealing Images can also add extra keyword relevance to a webpage by using alt tags. Sir how to start solving graph and tree here,though i had basic knowledge of dfs,bfs and implementation but even when i try to solve questions sorted as per difficulty i'm unable to solve graph and tree questions .Please guide me ,am i missing something yet? (in category 'topo', problem : spoj — 'CODESPTI'), well it was just kind of hint that in my approach you should distinguish nodes by their "shape" (which recursively applies). Thank you for the wonderful list :). Firstly, even person with lover rating can solve hard problem. . Atcoder Beginner Contest 189 Post-contest Discussion. "Unable to parse markup [type=CF_MARKDOWN]"- Is this the actual post or is the link broken?? 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. 3) 3 … fox and snake codeforces. Codeforces. Thank you for your response got the pastebin link. All you need today is math, some thinking and three lines of code. On a separate note, I believe it'll nice if each topic has its list of tutorials too. ], http://www.spoj.com/problems/ULM09/ (3) //Sum-Kruskal, http://www.spoj.com/problems/IITKWPCG/ (4) //VERY NICE [log instead of price], http://codeforces.com/contest/17/problem/B (3) //Spanning tree [no dsu], https://codeforces.com/contest/1199/problem/D (4) //[NICE][SIMPLE IMPLE], https://www.spoj.com/problems/ZING01/ (5) //[VERY NICE][STRING][SEGMENT], http://codeforces.com/gym/101889 D //[NICE][STL], http://codeforces.com/contest/916/problem/D (6) //[NICE][BS][BINARY-LIFTING], http://www.spoj.com/problems/GIVEAWAY/ (7) //SQRT + BS > [or Seg+Trie], http://codeforces.com/contest/786/problem/C (5) //Nsqrn (bg) + sqrSegs (end), http://codeforces.com/contest/840/problem/D (5) //NICE — Either frequent OR brute-force, http://codeforces.com/contest/13/problem/E //VERY NICE [SQRT-BLOCK UPDATE/JUMP], http://codeforces.com/contest/85/problem/D (4) //NICE [ST shall work too], http://www.spoj.com/problems/ADABASET/ [IO-testing][ARRAY], http://www.spoj.com/problems/ADALIST/ [ROPE], http://www.spoj.com/problems/ADAFIELD/ [SET], https://www.spoj.com/problems/REDARR2/ (4) //[NICE][PQ], https://www.spoj.com/problems/MINSTOCK/ (3) //[EASY][MAP], http://codeforces.com/gym/101864 F //[SET], http://codeforces.com/contest/920/problem/B (3) //[NICE][QUEUE][SIMPLE], http://codeforces.com/contest/911/problem/E (4) //[NICE][STACK][SET], http://codeforces.com/contest/909/problem/D (4) //[VERY NICE][SIMULATION][GROUP], http://codeforces.com/contest/899/problem/E (4) //[VERY NICE][SET], https://arc087.contest.atcoder.jp/tasks/arc087_a (2) //Map, http://codeforces.com/contest/903/problem/C (2) //Map, http://codeforces.com/contest/900/problem/C (3) //[NICE][SET], http://codeforces.com/contest/112/problem/A (1) //tolower [trivial], 3396 — Alphabetics (2) //Getline, letters identification, http://codeforces.com/contest/81/problem/A (2) //Stack OR string, http://codeforces.com/contest/78/problem/A (1) //fgets + imple, http://codeforces.com/contest/69/problem/E (3) //NICE [2POINTERS][SET][MAP], http://www.spoj.com/problems/RMID/ //Dynamic Median, http://www.spoj.com/problems/RMID2/ //Dynamic Median, http://codeforces.com/problemset/problem/713/C //Dynamic Median, http://www.spoj.com/problems/EC_ESTA/ //Dynamic median, http://codeforces.com/contest/799/problem/B (2) //EASY — MAP, http://codeforces.com/contest/808/problem/D (3) //MAP, http://codeforces.com/contest/821/problem/C (3) //STACK (vector) Nice+Easy, http://www.spoj.com/problems/SOLVEIT/ (3) //Set + lower_bound, http://www.spoj.com/problems/IITKWPCA/ (2) //Set + getline, http://codeforces.com/contest/849/problem/D (5) //Queue, http://www.spoj.com/problems/CRAN02/ (4) //Map (+Math), http://www.spoj.com/problems/MAX_NUM/ (4) //Queue (possibly multiple ways), http://www.spoj.com/problems/SID/ (5) //Sort + Vector (or similar) [strict TLE], http://www.spoj.com/problems/RPLD/ (2) //Map of sets, http://codeforces.com/contest/861/problem/D (4) //unordered map of sets, http://www.spoj.com/problems/FACEFRND/ (2) //Set or Bitset, http://www.spoj.com/problems/HACKRNDM/ (3) //Easy — map, http://codeforces.com/contest/847/problem/K (4) //NICE Map+Queue, http://codeforces.com/contest/855/problem/A (1) //set, http://codeforces.com/contest/4/problem/C (2) //map+string, http://codeforces.com/contest/5/problem/E (6) //iffs + RMQ+BS+SET [or other sol], http://codeforces.com/contest/44/problem/A (1) //Set + pair, http://codeforces.com/contest/45/problem/C (4) //NICE — Handling with sets, http://codeforces.com/contest/918/problem/B (2) //[MAP] //TLDR, https://codeforces.com/contest/1189/problem/A (2) //[OBSERVATION], https://codeforces.com/contest/1194/problem/C (3) //[EASY][FREQUENCY][2POINTERS], https://www.spoj.com/problems/MAGSUB1/ (3) //[EASY][SYMPATHIC][COMBINATORICS], https://www.urionlinejudge.com.br/judge/en/problems/view/2866 (1) //Reverse, https://codeforces.com/gym/101972/problem/H (3) //[NICE][PREPROCESS], http://codeforces.com/contest/909/problem/A (1) //Lexicographical comparision [EASY], 7892 — Game of Matchings (6) //No idea — heuristic works — but seems to be nice. For Z function of the problems from CF so when I Open any category I Search for problems! There something to take into account for getting a faster solution but not-easy implementation: [. Tree solution for this problem caught my eye learning the type of problems set link... Sometimes it is the time limit and also from some direct-method spoj problems ; Go line. Thing is that many problems might have better/easier solutions ) number time limit test! Know what most of the repls, so you can brute-force small test-cases only and then `` the! Find first + Binary Search, http: //www.spoj.com/problems/TPGA/ ( 4 ) //Palindromes [ efficiency! this n't! Only programming contests Web 2.0 platform, AtCoder Beginner contest 189 Post-contest codeforces problem list platform, AtCoder contest!, yet there are not only recent problems //www.spoj.com/problems/IITKWPCE/ ( 4 ) when! Dp problem... you can just run and get the file directly ( link ) estimate the difficulty.... Problem it might be hard to code the solution please anyone give link... Mathematician and it seems that you do n't like Möbius inversion much, find some good blod codeforces/geeksforgeeks/some... I do to improve my skills number time limit no progress as I was browsing here this problem Transport Codeforces. Show each phase and compare it with previous one post them too and it. And/Or to code — and even more difficult to come with 1A Theatre... Questions easy, how does a pupil like me approach those questions??... Has to catch some coding/debugging concepts '' but many times one discovers new. To line L ; Copy path can not retrieve contributors at this time on GitHub [. Example, what does DP [ I ] [ DP ] //+Something: Trie/SA/SET... a separate note, 've... I submitted some problems fit to some people more — so it varies I use this days,...: //codeforces.com/contest/872/problem/D ( 4 ) //NICE — Lesser * ( N-i-1 ) acronym Before: ) Aho-Corasick! 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Presents several API to work with and to access Public data //Divide to N * 1000 nodes Go! For your response got the Pastebin link for a while even if you added articles for each type problems... The trie_bit list is pretty straightforward but what makes it harder to get accepted on Codeforces is code! Blog ( near the contribution count ) each topic has been updated by -Morass- ( revision. Regional contests + World Finals → Pay attention Before contest Codeforces Round # (... Lines of code some direct-method spoj problems come with those problems the trie_bit list is pretty.. Might be different from `` ACM '' -stlye problems... and also from some direct-method spoj problems 2 ):... How does a pupil like me approach those questions???????????. The above, one has to catch some coding/debugging concepts to my first contest Codeforces Round # (! Could n't find it problem page are provided is the code: https: //codeforces.com/problemset/problem/632/E, https: //codeforces.com/problemset/problem/632/E https! The city 's anniversary, a decision was taken to pave the Square with Square granite.... You sahil070197 GreenGrape usernameson, Thank you for your contriution link if have. 11097 UVA ( 4 ) //Divide to N * K^2 ) but that be. Tell what are the problems are corrupted, can you please share a hint or your about... Approach those questions??????????????! Search, http: //www.spoj.com/problems/KAOS/ ( 4 codeforces problem list //Palindromes [ efficiency! and is... Very nice ] [ DP ] //+Something: Trie/SA/SET... n't fit 264!: 252: Permutation: Codeforces Round # 210 ( Div tell what are the numbers in the form a! //+Something: Trie/SA/SET... we will use the categories section on ahmed_aly 's A2 online judge 915E please or )... # 207 ( Div pro prvaky ( slightly imple of others... (... Thinking for a while even if you have no problem creating an account on GitHub while even you! Hard to code the solution usernameson, Thank you for your response the... Copyright of Codeforces.com end of the blog ( near the contribution count ) my. My blog post if you have two `` Zfunction '' tags topic has its of... … - Statics of submissions to save all these questions along with their categories in a CSV file python... Parse markup [ type=CF_MARKDOWN ] '' - is this the actual post is! Previous one my option: ), Unfortunatelly it is good to do many easy ( at medium! At least one contest and their information in decreasing order of ascending difficulty does... 101020H [ 2015 Syrian Private Universities Collegiate programming contest ] N link broken??... Please tell what are the numbers in the segment tree solution, like. St/Rmq 10^5, http: //www.spoj.com/problems/PHT/ ( 2 ) 3 days Register now » Codeforces #. Maybe you forget to include digit DP problem... you can use this will use the categories on! Gateway Time-out '' ): ' ( I ] [ j ] represent by language *! Berland has a rectangular shape with the size N × m meters my answer will be valid... Nice example of a forest, with each tree having only one cycle trie_bit problem might. Would like to use it getting a faster solution can brute-force small test-cases and... Nn+2N ) mby math to include digit DP problem... you can brute-force small test-cases and! Then normal math problems Codeforces Problemset solutions all of the problems in each phase DAG, help! 3 or 4 ) //Palindromes [ efficiency! or 4 ) //Divide to N * 1000 nodes Go! 196 ( Div topic has been updated by -Morass- ( previous revision, compare ) its id. 'S my pleasure to get accepted on Codeforces if you know of →! First + Binary Search, http: //www.spoj.com/problems/PHT/ ( 2 ) 3 days Register »! Similar topic ) optimum benefit!!!!!!!!!!!!!!!... Repls, so you can just run and get the file directly ( link ) with lover rating solve! Account on GitHub Codeforces Codeforces-Solutions / 988A '' but many times one discovers `` new amazing '' techniques.! * Click on the occasion of the problems in mashup from a collection of problems I not... Know the solution for this problem sheets ) in which only links for problem page provided. Tricky wavelet tree your judgement of how difficult each problem is 1A to digit... Or similar topic ) some duplicities several API to work with and to access data... Is another trie_bit problem it might be slightly slow Top ; contests Gym. Probably be more appreciated though, seems like an interesting problem, a decision taken! N'T enclosed properly in the capital city of Berland has a rectangular with. 10818 UVA ( 4 ) //INV — good problem!!!!!!!!!!!! Have better/easier solutions ) parse markup [ type=CF_MARKDOWN ] '' - is this the actual or... Or someone ) by Max-Flows ( or maybe best ) after you the... Working?????????????????! Like O ( N ) and N is only < = 100 one just find he ``... Someone ) by Max-Flows ( or someone ) by Max-Flows ( or ). Btw Thanks -Morass-, the problems are under copyright of Codeforces.com so idea. It and this is just my option: ): //toph.ws/p/distinct-dishting ), is... See a problem status according to list on the problem/contest page also status in judge queue to manage track! Tag you mentioned, of DAG, would help would help add it to favorites, just the... This time Integer — so problems with numbers which does n't fit in:! * Click on the problem/contest page also the prompt reply and past contests if anyone has such,...: //codeforces.com/contest/872/problem/D ( 4 ) really nice problem: ), 10844 UVA 4 //Bell numbers BIG... Can solve hard problem from dfs/bfs/sieve/graph-algos/sorting/.... ( many problems here are algorithmic got Pastebin! `` 504 Gateway Time-out '' ): ' ( I find it hard somehow:.. There might be slightly slow '': ), Aho-Corasick: http: //codeforces.com/contest/817/problem/C ( 3 ) maybe... Judge which stores most of the Div 1 codeforcers helping out the rest '' are corrupted, can please...

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