Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Kotlin Heroes: Episode 11
9 days
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
413B	Spyke Chatting implementation	1300	x1699
413A	Data Recovery implementation	1200	x2618
412E	E-mail Addresses implementation	1900	x840
412D	Giving Awards dfs and similar	2000	x1876
412C	Pattern implementation, strings	1200	x3916
412B	Network Configuration greedy, sortings	900	x5395
412A	Poster greedy, implementation	900	x4425
411C	Kicker implementation	1700	x1224
411B	Multi-core Processor implementation	1600	x1274
411A	Password Check *special problem, implementation	800	x7205
409I	Feed the Golorp *special problem	2400	x122
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8878
409G	On a plane *special problem, geometry	2200	x516
409F	000001 *special problem	1900	x2087
409E	Dome *special problem	1800	x572
409D	Big Data *special problem	1700	x1710
409C	Magnum Opus *special problem	1700	x1974
409B	Mysterious Language *special problem	1700	x1355
409A	The Great Game *special problem	1700	x2464
408B	Garland implementation	1200	x9242
408A	Line to Cashier implementation	900	x11223
407E	k-d-sequence data structures	3100	x741
407D	Largest Submatrix 3 dp, hashing	2700	x561
407C	Curious Array brute force, combinatorics, implementation, math	2500	x988
407B	Long Path dp, implementation	1600	x6494
407A	Triangle brute force, geometry, implementation, math	1600	x4869
406E	Hamming Triples implementation, math, two pointers	2800	x234
406D	Hill Climbing dfs and similar, geometry, trees	2200	x1165
405E	Graph Cutting dfs and similar, graphs	2300	x1390
405D	Toy Sum greedy, implementation, math	1700	x3113
405C	Unusual Product implementation, math	1600	x4618
405B	Domino Effect	1100	x5760
405A	Gravity Flip greedy, implementation, sortings	900	x100251
404E	Maze 1D binary search, greedy, implementation	2200	x576
404D	Minesweeper 1D dp, implementation	1900	x2145
404C	Restore Graph dfs and similar, graphs, sortings	1800	x5189
404B	Marathon implementation, math	1500	x2918
404A	Valera and X implementation	1000	x23838
403E	Two Rooted Trees data structures, implementation, trees	2900	x210
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1098
402E	Strictly Positive Matrix graphs, math	2200	x2179
402D	Upgrading Array dp, greedy, math, number theory	1800	x2605
402C	Searching for Graph brute force, constructive algorithms, graphs	1500	x5856
402B	Trees in a Row brute force, implementation	1400	x3801
402A	Nuts greedy, math	1100	x4588
401E	Olympic Games math	2500	x168
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4141
401C	Team constructive algorithms, greedy, implementation	1400	x19909
401B	Sereja and Contests greedy, implementation, math	1200	x4428
401A	Vanya and Cards implementation, math	800	x16150
400E	Inna and Binary Logic binary search, bitmasks, data structures	2100	x948
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x2896
400C	Inna and Huge Candy Matrix implementation, math	1500	x2887
400B	Inna and New Matrix of Candies brute force, implementation, schedules	1200	x7679
400A	Inna and Choose Options implementation	1000	x6465
399B	Red and Blue Balls		x1837
399A	Pages implementation		x4153
398E	Sorting Permutations		x90
398D	Instant Messanger data structures		x891
398C	Tree and Array constructive algorithms		x214
398B	Painting The Wall dp, probabilities		x1023
398A	Cards constructive algorithms, implementation		x922
397B	On Corruption and Numbers constructive algorithms, implementation, math		x750
397A	On Segment's Own Points implementation		x2621
396E	On Iteration of One Well-Known Function math		x148
396D	On Sum of Number of Inversions in Permutations combinatorics, math		x421
396C	On Changing Tree data structures, graphs, trees		x1580
396B	On Sum of Fractions math, number theory		x1075
396A	On Number of Decompositions into Multipliers combinatorics, math, number theory		x1502
394E	Lightbulb for Minister geometry		x117
394D	Physical Education and Buns brute force, implementation, math		x268
394C	Dominoes constructive algorithms, greedy		x516
394B	Very Beautiful Number math		x572
394A	Counting Sticks brute force, implementation		x2658
393B	Three matrices		x1978
393A	Nineteen		x6617
392E	Deleting Substrings		x179
392D	Three Arrays data structures		x217
392C	Yet Another Number Sequence combinatorics, math, matrices		x589
392B	Tower of Hanoi dp		x922
392A	Blocked Points math		x971
391F3	Stock Trading		x107
391F2	Stock Trading greedy		x108
391F1	Stock Trading dp		x178
391E2	Three Trees		x153
391E1	Three Trees		x116
391D2	Supercollider data structures		x196
391D1	Supercollider brute force		x211
391C3	The Tournament		x167
391C2	The Tournament greedy		x134
391C1	The Tournament brute force		x185
391B	Word Folding brute force		x387
391A	Genetic Engineering implementation, two pointers		x1717
390E	Inna and Large Sweet Matrix		x260
390D	Inna and Sweet Matrix constructive algorithms		x513
390C	Inna and Candy Boxes data structures		x628
390B	Inna, Dima and Song implementation		x1176
390A	Inna and Alarm Clock implementation		x3507
389B	Fox and Cross greedy, implementation	1100	x6895
389A	Fox and Number Game greedy, math	1000	x14033