Problemset - Codeforces

Rating changes for last rounds are temporarily rolled back. They will be returned soon. ×

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
3 days
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
427D	Match & Catch dp, string suffix structures, strings	2200	x2084
427C	Checkposts dfs and similar, graphs, two pointers	1700	x12898
427B	Prison Transfer data structures, implementation	1100	x13676
427A	Police Recruits implementation	800	x72059
426B	Sereja and Mirroring implementation	1300	x3765
426A	Sereja and Mugs implementation	800	x8972
425E	Sereja and Sets dp	2500	x543
425D	Sereja and Squares binary search, data structures, hashing	2300	x1386
425C	Sereja and Two Sequences data structures, dp	2300	x881
425B	Sereja and Table bitmasks, greedy	2200	x1280
425A	Sereja and Swaps brute force, sortings	1500	x3806
424E	Colored Jenga dfs and similar, dp, probabilities	2500	x122
424D	Biathlon Track binary search, brute force, constructive algorithms, data structures, dp	2300	x554
424C	Magic Formulas math	1600	x5176
424B	Megacity binary search, greedy, implementation, sortings	1200	x7322
424A	Squats implementation	900	x8168
421D	Bug in Code binary search, data structures, sortings	1900	x492
421A	Pasha and Hamsters constructive algorithms, implementation	800	x5764
420E	Playing the ball geometry	2600	x213
420D	Cup Trick data structures	2200	x763
420C	Bug in Code data structures, graphs, implementation, two pointers	1900	x1192
420B	Online Meeting implementation	1800	x1009
420A	Start Up implementation	1000	x5862
418E	Tricky Password data structures	3100	x290
418D	Big Problems for Organizers data structures, graphs, trees	2800	x466
417E	Square Table constructive algorithms, math, probabilities	2400	x766
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2370
417C	Football constructive algorithms, graphs, implementation	1400	x4605
417B	Crash implementation	1400	x1747
417A	Elimination dp, implementation, math	1500	x2864
416E	President's Path dp, graphs, shortest paths	2500	x1387
416D	Population Size greedy, implementation, math	2400	x902
416C	Booking System binary search, dp, greedy, implementation	1600	x7617
416B	Art Union brute force, dp, implementation	1300	x8458
416A	Guess a number! greedy, implementation, two pointers	1400	x8633
415B	Mashmokh and Tokens binary search, greedy, implementation, math	1500	x6109
415A	Mashmokh and Lights implementation	900	x8762
414E	Mashmokh's Designed Problem data structures	3200	x191
414D	Mashmokh and Water Tanks binary search, data structures, greedy, trees, two pointers	2300	x673
414C	Mashmokh and Reverse Operation combinatorics, divide and conquer	2100	x2165
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20703
414A	Mashmokh and Numbers constructive algorithms, number theory	1500	x9621
413E	Maze 2D data structures, divide and conquer	2200	x663
413D	2048 bitmasks, dp	2000	x749
413C	Jeopardy! greedy, math	1400	x2301
413B	Spyke Chatting implementation	1300	x1669
413A	Data Recovery implementation	1200	x2532
412E	E-mail Addresses implementation	1900	x808
412D	Giving Awards dfs and similar	2000	x1796
412C	Pattern implementation, strings	1200	x3845
412B	Network Configuration greedy, sortings	900	x5258
412A	Poster greedy, implementation	900	x4296
411C	Kicker implementation	1700	x1026
411B	Multi-core Processor implementation	1600	x1248
411A	Password Check *special problem, implementation	800	x6950
409I	Feed the Golorp *special problem	2400	x115
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8634
409G	On a plane *special problem, geometry	2200	x498
409F	000001 *special problem	1900	x2037
409E	Dome *special problem	1800	x562
409D	Big Data *special problem	1700	x1692
409C	Magnum Opus *special problem	1700	x1943
409B	Mysterious Language *special problem	1700	x1341
409A	The Great Game *special problem	1700	x2434
408B	Garland implementation	1200	x8831
408A	Line to Cashier implementation	900	x10975
407E	k-d-sequence data structures	3100	x684
407D	Largest Submatrix 3 dp, hashing	2700	x539
407C	Curious Array brute force, combinatorics, implementation, math	2500	x950
407B	Long Path dp, implementation	1600	x6400
407A	Triangle brute force, geometry, implementation, math	1600	x4739
406E	Hamming Triples implementation, math, two pointers	2800	x226
406D	Hill Climbing dfs and similar, geometry, trees	2200	x1124
405E	Graph Cutting dfs and similar, graphs	2300	x1325
405D	Toy Sum greedy, implementation, math	1700	x3083
405C	Unusual Product implementation, math	1600	x4563
405B	Domino Effect	1100	x5615
405A	Gravity Flip greedy, implementation, sortings	900	x93908
404E	Maze 1D binary search, greedy, implementation	2200	x561
404D	Minesweeper 1D dp, implementation	1900	x2055
404C	Restore Graph dfs and similar, graphs, sortings	1800	x4988
404B	Marathon implementation, math	1500	x2894
404A	Valera and X implementation	1000	x22791
403E	Two Rooted Trees data structures, implementation, trees	2900	x201
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1061
402E	Strictly Positive Matrix graphs, math	2200	x2075
402D	Upgrading Array dp, greedy, math, number theory	1800	x2513
402C	Searching for Graph brute force, constructive algorithms, graphs	1500	x5681
402B	Trees in a Row brute force, implementation	1400	x3686
402A	Nuts greedy, math	1100	x4503
401E	Olympic Games math	2500	x167
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3962
401C	Team constructive algorithms, greedy, implementation	1400	x19241
401B	Sereja and Contests greedy, implementation, math	1200	x4377
401A	Vanya and Cards implementation, math	800	x15857
400E	Inna and Binary Logic binary search, bitmasks, data structures	2100	x931
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x2791
400C	Inna and Huge Candy Matrix implementation, math	1500	x2870
400B	Inna and New Matrix of Candies brute force, implementation, schedules	1200	x7315
400A	Inna and Choose Options implementation	1000	x6399