Problemset - Codeforces

→ Pay attention

Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
73C	LionAge II dp	1800	x2126
73B	Need For Brake binary search, greedy, sortings	2000	x507
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1360
72I	Goofy Numbers *special problem, implementation	1500	x465
72H	Reverse It! *special problem, implementation	1600	x267
72G	Fibonacci army *special problem, dp	1000	x2316
72F	Oil *special problem, greedy, math	1900	x120
72E	Ali goes shopping *special problem, brute force, strings	1800	x173
72D	Perse-script *special problem, expression parsing	2300	x75
72C	Extraordinarily Nice Numbers *special problem, math	1200	x923
72B	INI-file *special problem, implementation	2200	x78
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x187
71E	Nuclear Fusion bitmasks, dp	2200	x746
71D	Solitaire brute force, implementation	2200	x657
71C	Round Table Knights dp, math, number theory	1600	x6567
71B	Progress Bar implementation, math	1300	x4560
71A	Way Too Long Words strings	800	x392603
70E	Information Reform dp, implementation, trees	2700	x505
70D	Professor's task data structures, geometry	2700	x997
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x581
70B	Text Messaging expression parsing, greedy, strings	1600	x1781
70A	Cookies math	1300	x3296
69E	Subsegments data structures, implementation	1800	x4414
69D	Dot dp, games	1900	x1014
69C	Game implementation	2000	x592
69B	Bets greedy, implementation	1200	x3285
69A	Young Physicist implementation, math	1000	x168186
68E	Contact geometry	2900	x72
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x473
68C	Synchrophasotron brute force	2200	x311
68B	Energy exchange binary search	1600	x4665
68A	Irrational problem implementation, number theory	1100	x4960
67E	Save the City! geometry	2500	x318
67D	Optical Experiment binary search, data structures, dp	1900	x1456
67C	Sequence of Balls dp	2600	x689
67B	Restoration of the Permutation greedy	1800	x779
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2123
66E	Petya and Post data structures, dp	2000	x759
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3187
66C	Petya and File System data structures, implementation	1800	x1078
66B	Petya and Countryside brute force, implementation	1100	x20696
66A	Petya and Java implementation, strings	1300	x6432
65E	Harry Potter and Moving Staircases dfs and similar, implementation	2900	x94
65D	Harry Potter and the Sorting Hat brute force, dfs and similar, hashing	2200	x433
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x789
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1379
65A	Harry Potter and Three Spells implementation, math	1800	x1824
64I	Sort the Table *special problem, sortings	2400	x89
64H	Table Bowling *special problem, sortings	2300	x114
64G	Path Canonization *special problem	2200	x121
64F	Domain *special problem, expression parsing	2000	x181
64E	Prime Segment *special problem, brute force, math, number theory	1800	x243
64D	Presents *special problem, greedy	1800	x289
64C	Table *special problem, greedy, implementation, math	1600	x339
64B	Expression *special problem, expression parsing	1500	x1019
64A	Factorial *special problem, implementation	1300	x3132
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x766
63D	Dividing Island constructive algorithms	1900	x1269
63C	Bulls and Cows brute force, implementation	1700	x1740
63B	Settlers' Training implementation	1200	x4842
63A	Sinking Ship implementation, sortings, strings	900	x11602
62E	World Evil dp, flows	2700	x232
62D	Wormhouse dfs and similar, graphs	2300	x374
62C	Inquisition geometry, implementation, sortings	2300	x252
62B	Tyndex.Brome binary search, implementation	1800	x1293
62A	A Student's Dream greedy, math	1300	x3461
61E	Enemy is weak data structures, trees	1900	x11375
61D	Eternal Victory dfs and similar, graphs, greedy, shortest paths, trees	1800	x6626
61C	Capture Valerian math	2000	x718
61B	Hard Work strings	1300	x3883
61A	Ultra-Fast Mathematician implementation	800	x112683
60E	Mushroom Gnomes math, matrices	2600	x327
60D	Savior brute force, dsu, math	2500	x452
60C	Mushroom Strife brute force, dfs and similar	2100	x567
60B	Serial Time! dfs and similar, dsu	1400	x4685
60A	Where Are My Flakes? implementation, two pointers	1300	x3661
59E	Shortest Path graphs, shortest paths	2000	x3482
59D	Team Arrangement constructive algorithms, greedy, implementation	2000	x638
59C	Title expression parsing	1600	x2111
59B	Fortune Telling implementation, number theory	1200	x6923
59A	Word implementation, strings	800	x179455
58E	Expression dp	2400	x393
58D	Calendar greedy, strings	2000	x734
58C	Trees brute force	1800	x2044
58B	Coins greedy	1300	x12276
58A	Chat room greedy, strings	1000	x131587
57E	Chess math, shortest paths	3000	x264
57D	Journey dp, math	2500	x342
57C	Array combinatorics, math	1900	x2695
57B	Martian Architecture implementation	1600	x1022
57A	Square Earth? dfs and similar, greedy, implementation	1300	x2930
56E	Domino Principle binary search, data structures, sortings	2200	x2405
56D	Changing a String dp	2100	x1650
56C	Corporation Mail data structures, expression parsing, implementation	1700	x1172
56B	Spoilt Permutation implementation	1300	x3742
56A	Bar implementation	1000	x8726
55E	Very simple problem geometry, two pointers	2500	x707
55D	Beautiful numbers dp, number theory	2500	x3941
55C	Pie or die games	1900	x1656
55B	Smallest number brute force	1600	x2881