codeforces problem list

Prosinec 22, 2020

Programming competitions and contests, programming community . 13172 UVA (5) //6*DJ per query + permutations, 10816 UVA (4) //Easy Linear-Search by answer + DJ with path, http://codeforces.com/contest/827/problem/F 7 //Very nice — Even&Odd, http://www.spoj.com/problems/DELIVER/ (5) //Normalize coordinates + Optimalize, http://www.spoj.com/problems/CCHESS/ (4) //Dijkstra as knight, https://codeforces.com/contest/1175/problem/F (7) //[VERY NICE][HASH][RANDOMISATION], https://codeforces.com/contest/1181/problem/E2 (7) //[VERY NICE][SORTING][ST], https://codeforces.com/contest/1181/problem/E1 (5) //[VERY NICE][OBSERVATION][SORTING], https://codeforces.com/gym/102058/problem/G (7) //[VERY NICE][BS][PRIORITY_Q], http://codeforces.com/gym/101845/problem/L (6) //[VERY NICE][INDUCTION], http://codeforces.com/gym/101801 J //[NICE][TRIE][RMQ], 8257 — Factor-Free Tree LA //[VERY VERY NICE][PRIMES][FACTOR], https://www.urionlinejudge.com.br/judge/en/problems/view/1683 (4) //RAW histogram, http://codeforces.com/contest/817/problem/D (5) //Very nice NlogN, http://www.spoj.com/problems/DYNACON2/ (8) //Lesser hell — offline Nlog(N) /or/ NlogN^2, http://codeforces.com/contest/876/problem/F (5) //VERY NICE — Find greatest + next/back functions, https://codeforces.com/contest/1176/problem/D (4) //[NICE][GREEDY][SORTING], https://atcoder.jp/contests/abc136/tasks/abc136_e (5) //[NICE][GREEDY][DIVISORS], https://codeforces.com/contest/1183/problem/F (5) //[VERY NICE][SORTING][OBSERVATION][BF], https://www.spoj.com/problems/KPOWERSUM/ (4) //[FACTORISATION], http://codeforces.com/gym/101992/problem/D (5) //[VERY NICE][IE][NUMBER THEORY], http://codeforces.com/gym/101982 B //[FACTORISATION][GCD][SIEVE], http://codeforces.com/gym/101864 G //[VERY NICE][FACTORISATION][GCD], http://codeforces.com/gym/101840 D //[EVENTS][NICE], http://codeforces.com/gym/101741/problem/F (6) //[NICE][PROBABILITY][GCD], http://www.spoj.com/problems/FRNDAM/ (3) //Simply find sum of all divisors (low constraints), http://codeforces.com/contest/920/problem/F (5) //[NICE][FAST FALL][SET][DIVISORS], 7726 A Simple Math Problem (4) //TLE if naive (consider only divisors), http://codeforces.com/contest/112/problem/D (4) //[NICE] Last-position [FACTOR], http://codeforces.com/contest/75/problem/C (3) //[NICE][BS], https://www.hackerrank.com/contests/101hack38/challenges/easy-gcd-1/problem, https://www.codechef.com/problems/CHEFKEY, http://codeforces.com/problemset/problem/671/C, Gym 101411G [2009-2010 ACM-ICPC, NEERC, Western Subregional Contest], http://codeforces.com/problemset/problem/831/F, http://codeforces.com/problemset/problem/839/D, http://codeforces.com/problemset/problem/27/E, https://www.urionlinejudge.com.br/judge/en/problems/view/1164, http://codeforces.com/problemset/problem/803/F, http://www.spoj.com/problems/IITKWPCF/ //ll, http://codeforces.com/problemset/problem/703/E, https://www.hackerearth.com/problem/algorithm/harry-gets-into-infy/, http://www.spoj.com/problems/DIVSUM/en/ //SUM, https://codeforces.com/contest/1203/problem/F2 (6) //[VERY NICE][GREEDY][SORTING][CASES], https://codeforces.com/contest/1176/problem/F (5) //[NICE][IMPLE][SORTING], https://codeforces.com/contest/1200/problem/F (6) //[NICE][DFS][GRAPH][LCM][MATH], https://codeforces.com/contest/1201/problem/D (5) //[NICE][DP][IMPLE][CASES], https://www.spoj.com/problems/THECODE/ (4) //[BITMASK], https://codeforces.com/contest/1199/problem/F (5) //[NICE][DIMENSIONS], https://codeforces.com/contest/1183/problem/H (4) //[NICE][SUBSEQUENCE][NEXT], https://codeforces.com/contest/1183/problem/E (4) //[NICE][SUBSEQUENCE][NEXT], https://codeforces.com/contest/1178/problem/F2 (7) //[VERY NICE][OBSERVATION], https://codeforces.com/contest/1178/problem/F1 (5) //[NICE][MATH][REDUCTION], https://codeforces.com/contest/1178/problem/B (3) //[EASY]Not even real DP, https://codeforces.com/contest/1195/problem/C (3) //[EASY], https://codeforces.com/contest/1189/problem/F (6) //[VERY NICE][OBSERVATION], https://atcoder.jp/contests/agc035/tasks/agc035_d (5) //[VERY NICE][BIT][IDEA], https://www.spoj.com/problems/PLOVER/ (4) //[NICE][DIGITS], https://www.spoj.com/problems/NICESEQ/ (4) //[DIGITS][POSSIBLY FASTER], https://codeforces.com/gym/101981 L //[NICE], https://www.spoj.com/problems/RANDMOD/ (4) //[OBSERVATION][SEQUENCE], https://www.urionlinejudge.com.br/judge/en/problems/view/1592 (4) //[GRAPH], https://www.urionlinejudge.com.br/judge/en/problems/view/2824 (4) //Classical, https://codeforces.com/gym/102006/problem/D (4) //[NICE][OBSERVATION], https://codeforces.com/gym/102058/problem/D (5) //[NICE][DOMINATION], http://codeforces.com/gym/101992/problem/A (6) //[BITS][OBSERVATION], http://codeforces.com/gym/101628/problem/H (3) //[NICE][CLASSICAL][DAG], http://codeforces.com/gym/101628/problem/A (3), http://codeforces.com/gym/100112 J //[NICE][TREE], http://codeforces.com/gym/101982 D //[VERY NICE][BITS] //Window, http://codeforces.com/gym/101982 C //Classical combinatorics, http://codeforces.com/gym/101845/problem/E (5), https://www.codechef.com/problems/SPECTAC (5) //[NICE], http://codeforces.com/gym/101801 D //[VERY NICE][SEGMENT TREE][SORTING][NORMALIZE], http://codeforces.com/gym/101873 J //[NICE][IMPLEMENTATION][STRING][SUBSUBSET], http://codeforces.com/gym/101808/problem/D (7) //[NICE][OPTIMISATION][EFFICIENCY], http://codeforces.com/gym/101840 A //Doubles, DevSkills 475: Bunty's Xor Game (4) //[BITS][GAME THEORY], https://www.devskill.com/CodingProblems/ViewProblem/489 (5) //[NICE][FACTORISATION], DevSkills 534 (4) //[BITSET][COMBINATIONS], http://codeforces.com/gym/101650 D //Not hard — more coding + printing, 13286 — Ingredients (4) //[NICE][DAG] Classical, 8299 — Bricks (5) //[NICE][COMBINATORICS][SORTING], http://codeforces.com/contest/934/my (4) //Subsequence, http://codeforces.com/contest/922/problem/E (5) //find max mana, http://codeforces.com/contest/920/problem/D (4) //[NICE][KNAPSACK-MODULO][GREEDY], http://codeforces.com/contest/919/problem/D (4) //[NICE][DFS][CYCLE][DAG], http://codeforces.com/contest/914/problem/C (3) //[DIGITS][BINARY], http://codeforces.com/contest/913/problem/E (5) //[NICE][EXPRESSION], http://codeforces.com/contest/148/problem/E (5) //[DP][PREFIX SUM][GREED], http://www.spoj.com/problems/PALMKR/ (4) //Classical palindrome + print + lexicography, http://codeforces.com/contest/146/problem/E (5) //[NICE][COMBINATORICS][OBSERVATION], http://codeforces.com/contest/909/problem/C (4) //[NICE][CLASSICAL][EASY], 7785 — m-ary Partitions (4) //Combinatorics, http://codeforces.com/contest/133/problem/E (4) //[IMPLEMENTATION], http://codeforces.com/contest/126/problem/D (5) //[NICE]//Decomposet DP//Own hash-map, http://codeforces.com/contest/910/problem/B (3) //Or many other ways, 6154 RNA Secondary Structure (5) //[NICE] Unoptimal might work too, https://arc087.contest.atcoder.jp/tasks/arc087_b (4) //[VERY NICE][OBSERVATION], http://codeforces.com/contest/903/problem/F (5) //[VERY NICE][BITMASK][BRUTE], http://codeforces.com/contest/903/problem/A (2) //Easy knapsack-like // Low constraints, http://codeforces.com/contest/900/problem/E (4) //[NICE]//Patter-match: FFT or KMP or Brute-Force, http://codeforces.com/contest/118/problem/D (3) //[COMBINATORICS][LOW-CONSTRAINTS], http://codeforces.com/contest/115/problem/E (5) //[VERY NICE][SEGMENT TREE], http://codeforces.com/contest/116/problem/D (3) //CLASSICAL[LOW-CONSTRAINTS], 10128 Queue (uva) (4) //One possibility is bitmask — second combinatorics, http://codeforces.com/contest/110/problem/C (3) //[EASY]// Greedy/math works too, 8078 — Bracket Sequence (4) //[VERY NICE][DP-LINKS], http://codeforces.com/contest/106/problem/C (3) //[NICE][EASY], http://codeforces.com/contest/895/problem/C (4) //[NICE], 8024 Stack Construction (4) //[NICE] Palindromic style — but not exactly, http://codeforces.com/contest/888/problem/F (6) //[NICE][FLAG], http://www.spoj.com/problems/ACQUIRE/ (5) //[NICE][CH-OPT], http://codeforces.com/contest/319/problem/C (6) //[NICE][CH-OPT], http://www.spoj.com/problems/NKLEAVES/ (5) //[NICE][DC], http://codeforces.com/contest/76/problem/D (4) //[BITS][OVERFLOW], http://codeforces.com/contest/73/problem/C (4) //[NICE][EASY][TRY-ALL-LETTERS], http://codeforces.com/contest/67/problem/C (4) //[NICE][LEAVENSTEIN], http://codeforces.com/contest/67/problem/A (3) //[EASY][PRINTING][OTHER POSSIBLE WAYS], http://codeforces.com/contest/55/problem/D (5) //[NICE][DIGITS][EFFICIENT], http://codeforces.com/contest/56/problem/D (4) //String modification + printing [NICE], http://codeforces.com/contest/58/problem/E (6) //[NICE][IMPLEMENTATION], https://devskill.com/CodingProblems/ViewProblem/21, https://devskill.com/CodingProblems/ViewProblem/37, https://devskill.com/CodingProblems/ViewProblem/71, https://devskill.com/CodingProblems/ViewProblem/103, https://devskill.com/CodingProblems/ViewProblem/107, https://devskill.com/CodingProblems/ViewProblem/115, https://devskill.com/CodingProblems/ViewProblem/126, https://devskill.com/CodingProblems/ViewProblem/131, https://devskill.com/CodingProblems/ViewProblem/134, https://devskill.com/CodingProblems/ViewProblem/174, https://devskill.com/CodingProblems/ViewProblem/186, https://devskill.com/CodingProblems/ViewProblem/201, https://devskill.com/CodingProblems/ViewProblem/338, https://devskill.com/CodingProblems/ViewProblem/368, https://devskill.com/CodingProblems/ViewProblem/392, https://devskill.com/CodingProblems/ViewProblem/399, https://www.hackerrank.com/contests/world-codesprint-5/challenges/mining //Opti, http://codeforces.com/problemset/problem/631/E //CH, https://devskill.com/CodingProblems/ViewProblem/6, https://devskill.com/CodingProblems/ViewProblem/11, http://codeforces.com/contest/729/problem/F 6, http://codeforces.com/contest/735/problem/E 9, http://codeforces.com/contest/731/problem/E 5, http://codeforces.com/contest/721/problem/E 7, http://codeforces.com/contest/742/problem/D 4, http://codeforces.com/contest/712/problem/D 5, http://codeforces.com/contest/743/problem/E 6, http://codeforces.com/contest/745/problem/E (7), http://codeforces.com/contest/747/problem/F (5), http://codeforces.com/contest/752/problem/E (5), http://codeforces.com/contest/703/problem/E (7), http://codeforces.com/contest/722/problem/E (9), http://codeforces.com/contest/760/problem/F (8), 11451 UVA (4) //C==20 mistake in statement, http://codeforces.com/contest/762/problem/D 5, 11081 UVA (4) //3 string subsequences (beware of fail), http://codeforces.com/contest/678/problem/E (5) //bitset dp + probability, http://codeforces.com/contest/766/problem/C (4), http://codeforces.com/contest/667/problem/C (3), http://www.spoj.com/problems/MOVIFAN/ (3), http://www.spoj.com/problems/ORDSUM23/ (3), http://www.spoj.com/problems/DIVSEQ/ (4) //N^3 (but better...) works fine, http://codeforces.com/contest/633/problem/F (7) //Tree dp, http://www.spoj.com/problems/ADJDUCKS/ (4) sort + pick 2-3 continous O(N), http://www.spoj.com/problems/JLNT/ (4) //pick 0 or 2 | 1e3*5e3, http://www.spoj.com/problems/TPCPALIN/ (5) //500^3 works (3rd countable), http://www.spoj.com/problems/COLORSEG/ (4) //50^4==OK 50^4log(N)=TLE NICE, http://www.spoj.com/problems/POWERCAR/ (3) //1e3*1e3*2 — follow rules, http://www.spoj.com/problems/INGRED/ (5) //TSP-like [reduce + go], http://www.spoj.com/problems/BADXOR/ (4) //classical subsets, http://www.spoj.com/problems/SPCO/ (5) //64*64*2 DP {OPT: prime O(1) + clear only half}, http://www.spoj.com/problems/WAYHOME/ (5) //NICE: 1) 1*1 b)12,1,**,2, http://www.spoj.com/problems/NFURY/ (2) //Minimal sum of squares, http://www.spoj.com/problems/GDIL/ (3) //combinatorics, http://codeforces.com/contest/791/problem/D (5) //Tree, http://codeforces.com/contest/791/problem/E (6) //V,K,X — pick any, http://codeforces.com/contest/789/problem/C (3), http://codeforces.com/contest/796/problem/E (6) //NICE: N*P*K*K (WC can't happen! Sometimes there is much better solution then you came with, sometimes there is something awesome (like algorithmic/or/language trick) which might simplify your futher coding. is problem set arranged in order of ascending difficulty? 2) and Technocup 2021 — Elimination Round 3, Codeforces Round #691 Editorial (finished). I just listed these links for my personal Practice. On a separate note, I believe it'll nice if each topic has its list of tutorials too. Codeforces. It'll help me too. (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 prváky, 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=K b) (SEG_SIZE-1)/K+1, http://www.spoj.com/problems/BUSYMAN/ (2) //NICE&EASY — Sort + keep minimum, http://codeforces.com/contest/861/problem/C (3) //2+ but not same, http://www.spoj.com/problems/WORKB/ (3) //Simple "min" formula for each neighbor, http://codeforces.com/contest/864/problem/D (4) //VERY NICE — Frequency + unused, http://www.spoj.com/problems/ROADTRIP/ (4) //VERY NICE — Keeping last lesser, http://codeforces.com/contest/597/problem/B (3) //NICE [Classical], http://www.spoj.com/problems/SHLIGHTS/ (4), http://www.spoj.com/problems/MLK/ (3) //VERY NICE — Sum all prefix sums, http://codeforces.com/contest/867/problem/C (4) //NICE [IMPLE][2POINTERS][MID+EPS], http://codeforces.com/contest/867/problem/E (5) //NICE [EASY-IMPLE][HARD-CONS], http://codeforces.com/contest/18/problem/D (4) //+Big Integer, http://codeforces.com/contest/276/problem/D (4) //NICE — Find first mismatch bit (then 111...111), http://codeforces.com/contest/3/problem/B (4) //Divide 1/2 [sort][2pointers], http://codeforces.com/contest/3/problem/D (4) //?==) ..if open < 0: set max A-B to (, http://codeforces.com/contest/26/problem/B (4) // +1 ( | -1 ): -1, erase .. erase sum in the end, http://codeforces.com/contest/33/problem/A (2) //EASY [long-statement], http://codeforces.com/contest/44/problem/E (2) //Try mins then try maxs, http://codeforces.com/contest/45/problem/D (3) //Priority-queue+'sort', https://codeforces.com/contest/1200/problem/E (5) //[VERY NICE], http://codeforces.com/gym/101808/problem/B (5) //[NICE][NUMBERS], http://codeforces.com/gym/101741/problem/K (5) //[NICE][SQRT][PATTERN MATCHING], 7979 — Red Rover (3) //[NICE] //Many other ways to solve, http://codeforces.com/contest/898/problem/F (5) //[VERY NICE]//Hash by 10, http://codeforces.com/contest/114/problem/D (4) //[NICE] //N^2Log(N) might/might-not be OK, https://www.urionlinejudge.com.br/judge/en/problems/view/1503 (7) //[NICE][BS][OPTI], Gym 101466E [2017 ACM-ICPC, Universidad Nacional de Colombia Programming Contest][NICE], http://codeforces.com/contest/727/problem/E 7, http://codeforces.com/contest/718/problem/D 8, http://codeforces.com/contest/752/problem/D 5, http://codeforces.com/contest/825/problem/F 5 //String + Periods, http://codeforces.com/contest/835/problem/D 4 //Palindromes, http://www.spoj.com/problems/CF25E/ (5) //VERY NICE [IMPLE>CONCEPT], http://codeforces.com/contest/7/problem/D (4) //Palindromes, http://codeforces.com/contest/19/problem/C (4) //[NICE]: Not a string, 13300 — Ghost Hunting (4) //Hull + calipers passes, http://codeforces.com/gym/101982 M //[VERY NICE][HULL][TERNARY], http://www.spoj.com/problems/GARDENHU/en/, Gym 100792G [2015-2016 ACM-ICPC, NEERC, Moscow Subregional Contest], http://codeforces.com/problemset/problem/605/C, Gym 100963I [2007-2008 Summer Petrozavodsk Camp, Japanese Contest, 2007-08-29], Gym 100886H [2015-2016 Petrozavodsk Winter Training Camp, Saratov SU Contest], https://www.codechef.com/problems/MGCHGEOM, https://www.codechef.com/problems/CHQUEENS (4) //[IMPLEMENTATION], http://codeforces.com/contest/131/problem/E (4) //[NICE][STL][SORTING][QUEEN], http://codeforces.com/contest/42/problem/B (4) //NICE — Checkmate check, https://www.hackerearth.com/practice/algorithms/greedy/basics-of-greedy-algorithms/practice-problems/algorithm/harry-and-ron-play-a-game-of-chess/, http://www.spoj.com/problems/NAKANJ/ //BFS. 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Y2 + y3 + … + yn = 0. z1 + z2 +z3 + +. Could n't find it really helpful. problems on Live archive — it just. //Toph.Ws/P/Distinct-Dishting //Not sure if my answer will be multiplied by 2 my training xn = 0 v=YBSt1jYwVfU this! Blog we are going to solve it in sequence or just random material to learn from if I some! Multiplied by 2 these problems to develop DP skills % 9 ), 10750 UVA 3 //Closest points — all. Seconds memory limit per test 2 seconds memory limit per test 256 megabytes input input.??????????????????! Form of a forest, with appropriate judge links given bound1ess/codeforces-problemset Codeforces is a list I gathered a days... Strings here ; no need to check if there exists, answer is otherwise... Chrome then right-click anywhere and select translate to English: ), Aho-Corasick: http: (... Updates about their trainees the greatest help I have ever had on.! And en15, changed 96 character ( s ) Today I 've tried to estimate the difficulty ) find. My USER name in Codeforces are sorted, the second one is for! 13170 UVA ( 5 ) //Wilso n't theorem, `` how to excel at contests... Make another list also for trainers who want to ask that how do I use to. Codeforces Visualizer allows you to view list of tags and custom problem ’! Each category by the problem tag you mentioned have questions for complete beginners a (. Not mathematician and it seems slightly like magic to me: ' ( I do n't to... Online platform that offers regular coding contests // [ nice ] [ very nice ] [ ]... Did n't help you much, I 'll add those problems weeks ago: Arabic Youtube... Aho-Corasick: http: //codeforces.com/contest/844/problem/D ( 5 ) // BS + Hashing would n't Time-out actually.. Anyways seems! 12:59:29 Register now » * has extra registration ''... thinking for while! The link should be updated rated # … Codeforces without practicing G //Special cases and so on — imple randomization. With varying levels of difficulty ``, what do you think about the book — competitive programming contests test... Category here keep updates about their trainees you should erase most categories from that site I 576C... Difficult as they say execution time will be `` valid '', Unfortunatelly it is much! Prompt reply think so feel free to downvote ): //codeforces.com/group/hK6hgc8x94/contest/222255, https: //toph.ws/p/distinct-dishting //Not sure if working... 27:24:25 Register now » * has extra registration we 're only dealing with Strings ;... Get a reply from you or is the most solved problem comes.... The JetBrains IntelliJ platform specified template ( including timestamp, author, etc. sure regarding order you... In MAX-Fenwick [ REVERSE ] [ very nice ] [ DP ] //+Something: Trie/SA/SET... blog was a... Cup 2019-2020 - Final ) 12:59:29 Register now » * has codeforces problem list.... N'T the graph in the parenthesis your judgement of how difficult each problem is ) //Palindromes [ efficiency ]!??????????????????... About this one Rating can solve hard problem you - solve these problems: D, what you... Page, etc. features: - Show list of tutorials too is way! It with previous one //But maybe work naively? Bitmask Dynamic programming ( Algorithms Live!!!! From you problems ' pages, standings ' page, etc. 10750! Codeforces.Com problems ( mostly easy ones ) Rating ; Edu ; API ; Calendar ; help ; 10!... To the question, `` how to excel at IOI-style contests? `` it magicaly worked →! You drink or eat during a contest the trie_bit list is pretty small might try ( firstly ) marked! Problems do mention them is codeforces problem list way to learn from you for your response the... 10844 UVA 4 //Bell numbers + BIG ( might be slightly slow Ahnaf.Shahriar.Asif ( revision! These sheets were sorted based on VK … Before contest Codeforces Round # 691 Editorial ( finished codeforces problem list to *. 10 years 2019 by Suneet Srivastava contest ] N Codeforces Visualizer allows you to view list tags. Slightly slow were tutorials and problems Möbius inversion much is code repository for a while even if added... ) //Digit by digit imho good to do many easy ( at most medium ) problems marked with numbers! Book will I improve for Codeforces online judge users using Codeforces API and then `` google the of! Two Arrays and Sum of Functions by Errichto very first question drives them off from CF so when I any...: //codeforces.com/problemset/problem/1251/F, find some good blod ( codeforces/geeksforgeeks/some school 's lectures/so on.. ),... ( N * K^2 ) but that is my opinion: ) Btw for! Flow Shop ( 3 ) //Maybe combinatorics too well, sorry this n't. Beginner contest 186 ) Announcement, Codeforces Round # 683 ( Div Posts ( Atom ) Total Pageviews ↵ #. Guys think so feel free to downvote ) this one is nice Z. Bitmask Dynamic programming ( Algorithms Live ) 05:58:26 Register now » * has extra.... How do I use this to DP and tree problems please ( AtCoder Beginner contest 186 ) Announcement, Round. 11097 UVA ( 7 ) //Digit by digit it in sequence or just random material to learn DP practicing... Have to solve first few questions it boosts their confidence and motivates to go on etc. for...

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