Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
01:18:30
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
01:18:30
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x314
193E	Fibonacci Number brute force, math, matrices	2900	x320
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x328
717A	Festival Organization combinatorics, math, number theory	2900	x332
603D	Ruminations on Ruminants geometry, math	2900	x337
1359F	RC Kaboom Show binary search, brute force, data structures, geometry, math	2900	x349
1738G	Anti-Increasing Addicts constructive algorithms, dp, greedy, math	2900	x366
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x373
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x373
930E	Coins Exhibition data structures, dp, math	2900	x404
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x420
1540C2	Converging Array (Hard Version) dp, math	2900	x436
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x442
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x444
704C	Black Widow dp, graphs, implementation, math	2900	x457
1870F	Lazy Numbers binary search, math	2900	x462
1028H	Make Square math	2900	x478
1747E	List Generation combinatorics, dp, math	2900	x482
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x506
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x516
321D	Ciel and Flipboard dp, greedy, math	2900	x525
167E	Wizards and Bets dfs and similar, graphs, math, matrices	2900	x545
1687D	Cute number binary search, brute force, data structures, dsu, implementation, math	2900	x556
685C	Optimal Point binary search, math	2900	x576
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x583
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x585
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x674
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1022
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1041
338D	GCD Table chinese remainder theorem, math, number theory	2900	x1090
364D	Ghd brute force, math, probabilities	2900	x1951
28E	DravDe saves the world geometry, math	2800	x85
802F	Marmots (hard) math, probabilities	2800	x120
335E	Counting Skyscrapers dp, math, probabilities	2800	x216
406E	Hamming Triples implementation, math, two pointers	2800	x227
1884E	Hard Design greedy, implementation, math	2800	x258
1031F	Familiar Operations brute force, graphs, math	2800	x264
288E	Polo the Penguin and Lucky Numbers dp, implementation, math	2800	x283
568D	Sign Posts brute force, geometry, math	2800	x298
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x319
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x337
1776D	Teamwork constructive algorithms, greedy, math	2800	x337
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x350
1942G	Bessie and Cards combinatorics, dp, math	2800	x352
461D	Appleman and Complicated Task dsu, math	2800	x355
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x364
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x368
850D	Tournament Construction constructive algorithms, dp, graphs, greedy, math	2800	x368
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x378
446D	DZY Loves Games math, matrices, probabilities	2800	x378
1473G	Tiles combinatorics, dp, fft, math	2800	x379
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x388
1732E	Location data structures, dp, math, number theory	2800	x406
1809G	Prediction combinatorics, dp, math	2800	x410
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x414
1067E	Random Forest Rank dp, graph matchings, math, trees	2800	x421
736D	Permutations math, matrices	2800	x450
493E	Vasya and Polynomial math	2800	x473
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x491
652F	Ants on a Circle constructive algorithms, math	2800	x516
1810F	M-tree data structures, math, sortings, trees	2800	x533
1863G	Swaps combinatorics, dp, graphs, math	2800	x555
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x556
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x565
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x576
850F	Rainbow Balls math	2800	x587
913F	Strongly Connected Tournament dp, graphs, math, probabilities	2800	x603
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x607
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x643
794E	Choosing Carrot games, math	2800	x659
986E	Prince's Problem brute force, data structures, math, number theory, trees	2800	x698
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x701
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x712
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x715
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x715
1208G	Polygons greedy, math, number theory	2800	x721
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x743
286E	Ladies' Shop constructive algorithms, fft, math	2800	x818
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x916
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x917
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x982
908G	New Year and Original Order dp, math	2800	x1280
109E	Lucky Interval brute force, math	2700	x98
113E	Sleeping combinatorics, implementation, math	2700	x116
549E	Sasha Circle geometry, math	2700	x145
267C	Berland Traffic math, matrices	2700	x159
86E	Long sequence brute force, math, matrices	2700	x178
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x233
472F	Design Tutorial: Change the Goal constructive algorithms, math, matrices	2700	x249
1016G	Appropriate Team bitmasks, math, number theory	2700	x253
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x266
76C	Mutation bitmasks, dp, math	2700	x267
457D	Bingo! combinatorics, math, probabilities	2700	x268
991F	Concise and clear brute force, greedy, implementation, math	2700	x294
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x312
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x314
460E	Roland and Rose brute force, geometry, math, sortings	2700	x334
1599G	Shortest path brute force, geometry, math, shortest paths	2700	x357
1423F	Coins math	2700	x360
1202F	You Are Given Some Letters... binary search, implementation, math	2700	x368