Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
4 days
Register now »

*has extra registration

Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
4 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1431E	Chess Match *special problem	2000	x232
1431D	Used Markers *special problem, greedy	1500	x486
1431C	Black Friday *special problem, implementation	1600	x746
1431B	Polycarp and the Language of Gods *special problem, implementation, two pointers	1400	x1054
1431A	Selling Hamburgers *special problem	800	x2151
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x869
1430F	Realistic Gameplay dp, greedy	2600	x1020
1430E	String Reversal data structures, greedy, strings	1900	x7325
1430D	String Deletion binary search, data structures, greedy, two pointers	1700	x9261
1430C	Numbers on Whiteboard constructive algorithms, data structures, greedy, implementation, math	1000	x28201
1430B	Barrels greedy, implementation, sortings	800	x20273
1430A	Number of Apartments brute force, constructive algorithms, math	900	x21751
1428H	Rotary Laser Lock binary search, interactive	3500	x127
1428G2	Lucky Numbers (Hard Version) dp, greedy	3000	x727
1428G1	Lucky Numbers (Easy Version) dp, greedy	2900	x644
1428F	Fruit Sequences binary search, data structures, divide and conquer, dp, two pointers	2400	x2588
1428E	Carrots for Rabbits binary search, data structures, greedy, math, sortings	2200	x4207
1428D	Bouncing Boomerangs constructive algorithms, greedy, implementation	1900	x4722
1428C	ABBB brute force, data structures, greedy, strings	1100	x22640
1428B	Belted Rooms graphs, implementation	1200	x15178
1428A	Box is Pull math	800	x17006
1427H	Prison Break binary search, games, geometry, ternary search	3500	x94
1427G	One Billion Shades of Grey flows, graphs	3300	x497
1427F	Boring Card Game data structures, greedy, trees	3200	x400
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1632
1427D	Unshuffling a Deck constructive algorithms, implementation	2000	x3694
1427C	The Hard Work of Paparazzi dp	2000	x6068
1427B	Chess Cheater greedy, implementation, sortings	1400	x11449
1427A	Avoiding Zero math, sortings	900	x18029
1426F	Number of Subsequences combinatorics, dp, strings	2000	x6157
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x8129
1426D	Non-zero Segments constructive algorithms, data structures, greedy, sortings	1500	x17592
1426C	Increase and Copy binary search, constructive algorithms, math	1100	x20538
1426B	Symmetric Matrix implementation	900	x21799
1426A	Floor Number implementation, math	800	x54928
1425I	Impressive Harvesting of The Orchard data structures	2800	x268
1425H	Huge Boxes of Animal Toys constructive algorithms	1300	x4395
1425F	Flamingoes of Mystery interactive	1400	x7168
1425E	Excitation of Atoms greedy, implementation	2200	x1013
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x898
1425C	Captain of Knights math	3100	x55
1425B	Blue and Red of Our Faculty! divide and conquer, dp	2600	x345
1425A	Arena of Greed games, greedy	1400	x7216
1424M	Ancient Language graphs, sortings	2200	x615
1424G	Years data structures, sortings	1300	x6681
1423N	BubbleSquare Tokens	3500	x172
1423M	Milutin's Plums interactive	2800	x324
1423L	Light switches meet-in-the-middle	2600	x586
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x5442
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x887
1423I	Lookup Tables bitmasks	3000	x158
1423H	Virus data structures, divide and conquer, dsu, graphs	2500	x625
1423G	Growing flowers data structures	3500	x261
1423F	Coins math	2700	x449
1423E	5G Antenna Towers geometry	2700	x98
1423D	Does anyone else hate the wind?	3100	x49
1423C	Dušan's Railway divide and conquer, graphs, trees	3500	x213
1423B	Valuable Paper binary search, flows, graph matchings, graphs	1900	x2102
1423A	Wakanda Forever	3500	x125
1422F	Boring Queries data structures, math, number theory	2700	x1270
1422E	Minlexes dp, greedy, implementation, strings	2700	x854
1422D	Returning Home graphs, shortest paths, sortings	2300	x3175
1422C	Bargain combinatorics, dp, math	1700	x8842
1422B	Nice Matrix greedy, implementation, math	1300	x15065
1422A	Fence geometry, math	800	x21866
1421E	Swedish Heroes brute force, dp, implementation	2700	x973
1421D	Hexagons brute force, constructive algorithms, greedy, implementation, math, shortest paths	1900	x4381
1421C	Palindromifier constructive algorithms, strings	1400	x13538
1421B	Putting Bricks in the Wall constructive algorithms, implementation	1100	x13471
1421A	XORwice bitmasks, greedy, math	800	x35411
1420E	Battle Lemmings dp, greedy	2500	x1045
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x8324
1420C2	Pokémon Army (hard version) data structures, divide and conquer, dp, greedy, implementation	2100	x5189
1420C1	Pokémon Army (easy version) constructive algorithms, dp, greedy	1300	x18970
1420B	Rock and Lever bitmasks, math	1200	x35756
1420A	Cubes Sorting math, sortings	900	x25201
1419F	Rain of Fire binary search, data structures, dfs and similar, dsu, graphs, implementation	2800	x563
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3502
1419D2	Sage's Birthday (hard version) binary search, brute force, constructive algorithms, greedy, sortings, two pointers	1500	x17403
1419D1	Sage's Birthday (easy version) binary search, constructive algorithms, greedy, sortings	1000	x26377
1419C	Killjoy greedy, implementation, math	1500	x16298
1419B	Stairs brute force, constructive algorithms, greedy, implementation, math	1200	x16968
1419A	Digit Game games, greedy, implementation	900	x20522
1418G	Three Occurrences data structures, divide and conquer, hashing, two pointers	2500	x2742
1418F	Equal Product data structures, math, number theory, two pointers	3000	x424
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x2187
1418D	Trash Problem data structures, implementation	2100	x4741
1418C	Mortal Kombat Tower dp, graphs, greedy, shortest paths	1500	x28092
1418B	Negative Prefixes greedy, sortings	1300	x17528
1418A	Buying Torches math	1000	x33776
1417B	Two Arrays greedy, math, sortings	1100	x15072
1417A	Copy-paste greedy, math	800	x18720
1416F	Showing Off flows, graph matchings, greedy, implementation	3300	x602
1416E	Split binary search, data structures, dp, greedy	3200	x431
1416D	Graph and Queries data structures, dsu, graphs, implementation, trees	2600	x2709
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x5053
1416B	Make Them Equal constructive algorithms, greedy, math	2000	x6678
1416A	k-Amazing Numbers binary search, data structures, implementation, two pointers	1500	x16707
1415F	Cakes for Clones dp	2900	x563
1415E	New Game Plus! constructive algorithms, greedy, math	2200	x3001

The only programming contests Web 2.0 platform

Server time: May/02/2026 08:01:55 (g2).

Desktop version, switch to mobile version.

Supported by