Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 3)
7 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
507D	The Maths Lecture dp, implementation	2200	x1704
505D	Mr. Kitayuta's Technology dfs and similar	2200	x2437
490F	Treeland Tour data structures, dfs and similar, dp, trees	2200	x1579
486E	LIS of Sequence data structures, dp, greedy, hashing, math	2200	x2160
476E	Dreamoon and Strings dp, strings	2200	x1769
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1311
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1572
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1453
440D	Berland Federalization dp, trees	2200	x633
431E	Chemistry Experiment binary search, data structures, ternary search	2200	x910
429D	Tricky Function data structures, divide and conquer, geometry	2200	x2611
427D	Match & Catch dp, string suffix structures, strings	2200	x2111
425B	Sereja and Table bitmasks, greedy	2200	x1284
420D	Cup Trick data structures	2200	x778
413E	Maze 2D data structures, divide and conquer	2200	x672
409G	On a plane *special problem, geometry	2200	x504
406D	Hill Climbing dfs and similar, geometry, trees	2200	x1133
404E	Maze 1D binary search, greedy, implementation	2200	x563
402E	Strictly Positive Matrix graphs, math	2200	x2086
387E	George and Cards binary search, data structures	2200	x855
387D	George and Interesting Graph graph matchings	2200	x965
385D	Bear and Floodlight bitmasks, dp, geometry	2200	x800
382D	Ksenia and Pawns dfs and similar, graphs, implementation, trees	2200	x657
377C	Captains Mode bitmasks, dp, games	2200	x1110
369E	Valera and Queries binary search, data structures	2200	x2063
369D	Valera and Fools dfs and similar, dp, graphs, shortest paths	2200	x1105
366E	Dima and Magic Guitar brute force, implementation, math	2200	x754
364B	Free Market dp, greedy	2200	x1151
354E	Lucky Number Representation constructive algorithms, dfs and similar, dp	2200	x873
353E	Antichain dp, graph matchings, greedy	2200	x573
351E	Jeff and Permutation greedy	2200	x1514
350E	Wrong Floyd brute force, constructive algorithms, dfs and similar, graphs	2200	x751
346C	Number Transformation II greedy, math	2200	x1422
345G	Suffix Subgroup *special problem, strings	2200	x53
345D	Chain Letter *special problem, dfs and similar, graphs	2200	x77
337E	Divisor Tree brute force, number theory, trees	2200	x1009
332C	Students' Revenge data structures, greedy, sortings	2200	x897
323B	Tournament-graph constructive algorithms, graphs	2200	x383
316G2	Good Substrings string suffix structures	2200	x467
316F3	Suns and Rays constructive algorithms, dfs and similar, implementation	2200	x164
316F1	Suns and Rays dfs and similar, implementation	2200	x165
316C1	Tidying Up flows	2200	x549
305D	Olya and Graph combinatorics, math	2200	x455
301D	Yaroslav and Divisors data structures	2200	x2231
286B	Shifting implementation	2200	x1103
282E	Sausage Maximization bitmasks, data structures, trees	2200	x3461
280C	Game on Tree implementation, math, probabilities, trees	2200	x3588
279D	The Minimum Number of Variables bitmasks, dp	2200	x713
274D	Lovely Matrix dfs and similar, graphs, greedy, sortings	2200	x1013
272E	Dima and Horses combinatorics, constructive algorithms, graphs	2200	x1177
271E	Three Horses constructive algorithms, math, number theory	2200	x480
257E	Greedy Elevator data structures, implementation	2200	x277
255E	Furlo and Rublo and Game games, implementation, math	2200	x835
253E	Printer binary search, data structures, implementation, sortings	2200	x523
245G	Suggested Friends brute force, graphs	2200	x425
243C	Colorado Potato Beetle dfs and similar, implementation	2200	x522
225D	Snake bitmasks, dfs and similar, graphs, implementation	2200	x914
219E	Parking Lot data structures	2200	x604
207C2	Game with Two Trees	2200	x79
196C	Paint Tree constructive algorithms, divide and conquer, geometry, sortings, trees	2200	x742
191E	Thwarting Demonstrations binary search, data structures, trees	2200	x817
183C	Cyclic Coloring dfs and similar	2200	x599
182A	Battlefield geometry, graphs, implementation, shortest paths	2200	x280
178F2	Representative Sampling dp, sortings, strings	2200	x317
172E	BHTML+BCSS *special problem, dfs and similar, expression parsing	2200	x269
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6328
153C	Caesar Cipher *special problem	2200	x366
150C	Smart Cheater data structures, math, probabilities	2200	x633
144E	Competition data structures, greedy	2200	x566
138C	Mushroom Gnomes - 2 binary search, data structures, probabilities, sortings	2200	x847
134C	Swaps constructive algorithms, graphs, greedy	2200	x461
125D	Two progressions constructive algorithms, greedy	2200	x394
120I	Luck is in Numbers greedy	2200	x303
115C	Plumber math	2200	x589
113C	Double Happiness brute force, math, number theory	2200	x1204
105C	Item World brute force, implementation, sortings	2200	x271
98B	Help King implementation, probabilities, trees	2200	x116
97E	Leaders dfs and similar, dsu, graphs, trees	2200	x371
86D	Powerful array data structures, implementation, math, two pointers	2200	x12900
86B	Tetris revisited constructive algorithms, graph matchings, greedy, math	2200	x402
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x523
76A	Gift dsu, graphs, sortings, trees	2200	x1461
73D	FreeDiv dfs and similar, graphs, greedy	2200	x618
72B	INI-file *special problem, implementation	2200	x76
71E	Nuclear Fusion bitmasks, dp	2200	x683
71D	Solitaire brute force, implementation	2200	x610
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x562
68C	Synchrophasotron brute force	2200	x305
65D	Harry Potter and the Sorting Hat brute force, dfs and similar, hashing	2200	x421
64G	Path Canonization *special problem	2200	x117
56E	Domino Principle binary search, data structures, sortings	2200	x2238
52C	Circular RMQ data structures	2200	x8443
51D	Geometrical problem implementation	2200	x419
47E	Cannon data structures, geometry, sortings	2200	x357
47D	Safe brute force	2200	x752
45G	Prime Problem number theory	2200	x1002
45B	School dp, dsu	2200	x269
42C	Safe cracking brute force, constructive algorithms	2200	x457
36C	Bowls geometry, implementation	2200	x330
28C	Bath Queue combinatorics, dp, probabilities	2200	x993