Problemset - Codeforces

→ Pay attention

Before contest
WorldQuant Round 1 (Codeforces Round 1128, Div. 1 + Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1427H	Prison Break binary search, games, geometry, ternary search	3500	x101
1427G	One Billion Shades of Grey flows, graphs	3300	x521
1427F	Boring Card Game data structures, greedy, trees	3200	x438
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1754
1427D	Unshuffling a Deck constructive algorithms, implementation	2000	x3758
1427C	The Hard Work of Paparazzi dp	2000	x6210
1427B	Chess Cheater greedy, implementation, sortings	1400	x11574
1427A	Avoiding Zero math, sortings	900	x18215
1426F	Number of Subsequences combinatorics, dp, strings	2000	x6497
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x8299
1426D	Non-zero Segments constructive algorithms, data structures, greedy, sortings	1500	x17952
1426C	Increase and Copy binary search, constructive algorithms, math	1100	x20858
1426B	Symmetric Matrix implementation	900	x22087
1426A	Floor Number implementation, math	800	x56571
1425I	Impressive Harvesting of The Orchard data structures	2800	x284
1425H	Huge Boxes of Animal Toys constructive algorithms	1300	x4453
1425F	Flamingoes of Mystery interactive	1400	x7413
1425E	Excitation of Atoms greedy, implementation	2200	x1029
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x940
1425C	Captain of Knights math	3100	x127
1425B	Blue and Red of Our Faculty! divide and conquer, dp	2600	x386
1425A	Arena of Greed games, greedy	1400	x7360
1424M	Ancient Language graphs, sortings	2200	x643
1424G	Years data structures, sortings	1300	x6906
1423N	BubbleSquare Tokens	3500	x176
1423M	Milutin's Plums interactive	2800	x376
1423L	Light switches meet-in-the-middle	2600	x670
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x5543
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x923
1423I	Lookup Tables bitmasks	3000	x302
1423H	Virus data structures, divide and conquer, dsu, graphs	2500	x683
1423G	Growing flowers data structures	3500	x358
1423F	Coins math	2700	x546
1423E	5G Antenna Towers geometry	2700	x141
1423D	Does anyone else hate the wind?	3100	x82
1423C	Dušan's Railway divide and conquer, graphs, trees	3500	x241
1423B	Valuable Paper binary search, flows, graph matchings, graphs	1900	x2289
1423A	Wakanda Forever	3500	x130
1422F	Boring Queries data structures, math, number theory	2700	x1459
1422E	Minlexes dp, greedy, implementation, strings	2700	x928
1422D	Returning Home graphs, shortest paths, sortings	2300	x3285
1422C	Bargain combinatorics, dp, math	1700	x8925
1422B	Nice Matrix greedy, implementation, math	1300	x15170
1422A	Fence geometry, math	800	x22032
1421E	Swedish Heroes brute force, dp, implementation	2700	x1042
1421D	Hexagons brute force, constructive algorithms, greedy, implementation, math, shortest paths	1900	x4446
1421C	Palindromifier constructive algorithms, strings	1400	x13679
1421B	Putting Bricks in the Wall constructive algorithms, implementation	1100	x13534
1421A	XORwice bitmasks, greedy, math	800	x37466
1420E	Battle Lemmings dp, greedy	2500	x1113
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x8549
1420C2	Pokémon Army (hard version) data structures, divide and conquer, dp, greedy, implementation	2100	x5326
1420C1	Pokémon Army (easy version) constructive algorithms, dp, greedy	1300	x19378
1420B	Rock and Lever bitmasks, math	1200	x39104
1420A	Cubes Sorting math, sortings	900	x25566
1419F	Rain of Fire binary search, data structures, dfs and similar, dsu, graphs, implementation	2800	x686
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3566
1419D2	Sage's Birthday (hard version) binary search, brute force, constructive algorithms, greedy, sortings, two pointers	1500	x17770
1419D1	Sage's Birthday (easy version) binary search, constructive algorithms, greedy, sortings	1000	x26782
1419C	Killjoy greedy, implementation, math	1500	x16463
1419B	Stairs brute force, constructive algorithms, greedy, implementation, math	1200	x17159
1419A	Digit Game games, greedy, implementation	900	x20729
1418G	Three Occurrences data structures, divide and conquer, hashing, two pointers	2500	x3071
1418F	Equal Product data structures, math, number theory, two pointers	3000	x565
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x2424
1418D	Trash Problem data structures, implementation	2100	x4863
1418C	Mortal Kombat Tower dp, graphs, greedy, shortest paths	1500	x31039
1418B	Negative Prefixes greedy, sortings	1300	x17885
1418A	Buying Torches math	1000	x37458
1417B	Two Arrays greedy, math, sortings	1100	x15168
1417A	Copy-paste greedy, math	800	x18821
1416F	Showing Off flows, graph matchings, greedy, implementation	3300	x738
1416E	Split binary search, data structures, dp, greedy	3200	x560
1416D	Graph and Queries data structures, dsu, graphs, implementation, trees	2600	x3028
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x5343
1416B	Make Them Equal constructive algorithms, greedy, math	2000	x6809
1416A	k-Amazing Numbers binary search, data structures, implementation, two pointers	1500	x18023
1415F	Cakes for Clones dp	2900	x629
1415E	New Game Plus! constructive algorithms, greedy, math	2200	x3071
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x6317
1415C	Bouncing Ball brute force, dp, implementation	1400	x11882
1415B	Repainting Street brute force, brute force, greedy	1100	x12618
1415A	Prison Break brute force, math	800	x15961
1413F	Roads and Ramen data structures, trees	2800	x1030
1413E	Solo mid Oracle greedy, math, ternary search	2100	x2332
1413D	Shurikens data structures, greedy, implementation	1700	x6978
1413C	Perform Easily binary search, brute force, dp, implementation, sortings, two pointers	1900	x6323
1413B	A New Technique implementation	1100	x12123
1413A	Finding Sasuke constructive algorithms, math	800	x15342
1411G	No Game No Life bitmasks, games, math, matrices	2700	x965
1411F	The Thorny Path greedy, math	3000	x540
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1873
1411D	Grime Zoo brute force, greedy, implementation, strings	2100	x2773
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x8706
1411B	Fair Numbers brute force, number theory	1000	x33837
1411A	In-game Chat implementation	800	x21906
1409F	Subsequences of Length Two dp, strings	2100	x5304
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x8595
1409D	Decrease the Sum of Digits greedy, math	1500	x21835
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x24971

The only programming contests Web 2.0 platform

Server time: Oct/15/2026 07:28:29 (f1).

Desktop version, switch to mobile version.

Supported by