Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round 978 (Div. 2)
6 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1426A	Floor Number implementation, math	800	x47965
1425I	Impressive Harvesting of The Orchard data structures	2800	x237
1425H	Huge Boxes of Animal Toys constructive algorithms	1300	x4166
1425F	Flamingoes of Mystery interactive	1400	x5739
1425E	Excitation of Atoms greedy, implementation	2200	x939
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x835
1425C	Captain of Knights math	3100	x41
1425B	Blue and Red of Our Faculty! divide and conquer, dp	2600	x283
1425A	Arena of Greed games, greedy	1400	x6534
1424M	Ancient Language graphs, sortings	2200	x531
1424G	Years data structures, sortings	1300	x5867
1423N	BubbleSquare Tokens	3500	x151
1423M	Milutin's Plums interactive	2800	x160
1423L	Light switches meet-in-the-middle	2600	x469
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4851
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x782
1423I	Lookup Tables bitmasks	3000	x106
1423H	Virus data structures, divide and conquer, dsu, graphs	2500	x527
1423G	Growing flowers data structures	3500	x214
1423F	Coins math	2700	x379
1423E	5G Antenna Towers geometry	2700	x76
1423D	Does anyone else hate the wind?	3100	x40
1423C	Dušan's Railway divide and conquer, graphs, trees	3500	x141
1423B	Valuable Paper binary search, flows, graph matchings, graphs	1900	x1809
1423A	Wakanda Forever	3500	x80
1422F	Boring Queries data structures, math, number theory	2700	x1028
1422E	Minlexes dp, greedy, implementation, strings	2700	x750
1422D	Returning Home graphs, shortest paths, sortings	2300	x2788
1422C	Bargain combinatorics, dp, math	1700	x8241
1422B	Nice Matrix greedy, implementation, math	1300	x14407
1422A	Fence geometry, math	800	x20935
1421E	Swedish Heroes brute force, dp, implementation	2700	x697
1421D	Hexagons brute force, constructive algorithms, greedy, implementation, math, shortest paths	1900	x4163
1421C	Palindromifier constructive algorithms, strings	1400	x12804
1421B	Putting Bricks in the Wall constructive algorithms, implementation	1100	x13084
1421A	XORwice bitmasks, greedy, math	800	x29095
1420E	Battle Lemmings dp, greedy	2500	x930
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x7590
1420C2	Pokémon Army (hard version) data structures, divide and conquer, dp, greedy, implementation	2100	x4686
1420C1	Pokémon Army (easy version) constructive algorithms, dp, greedy	1300	x17598
1420B	Rock and Lever bitmasks, math	1200	x25755
1420A	Cubes Sorting math, sortings	900	x23395
1419F	Rain of Fire binary search, data structures, dfs and similar, dsu, graphs, implementation	2800	x491
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3280
1419D2	Sage's Birthday (hard version) binary search, brute force, constructive algorithms, greedy, sortings, two pointers	1500	x15594
1419D1	Sage's Birthday (easy version) binary search, constructive algorithms, greedy, sortings	1000	x24358
1419C	Killjoy greedy, implementation, math	1500	x15382
1419B	Stairs brute force, constructive algorithms, greedy, implementation, math	1200	x16256
1419A	Digit Game games, greedy, implementation	900	x19566
1418G	Three Occurrences data structures, divide and conquer, hashing, two pointers	2500	x1937
1418F	Equal Product data structures, math, number theory, two pointers	3000	x369
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x1873
1418D	Trash Problem data structures, implementation	2100	x4362
1418C	Mortal Kombat Tower dp, graphs, greedy, shortest paths	1500	x19929
1418B	Negative Prefixes greedy, sortings	1300	x16676
1418A	Buying Torches math	1000	x23100
1417B	Two Arrays greedy, math, sortings	1100	x14470
1417A	Copy-paste greedy, math	800	x18239
1416F	Showing Off flows, graph matchings, greedy, implementation	3300	x463
1416E	Split binary search, data structures, dp, greedy	3200	x294
1416D	Graph and Queries data structures, dsu, graphs, implementation, trees	2600	x2056
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4415
1416B	Make Them Equal constructive algorithms, greedy, math	2000	x6131
1416A	k-Amazing Numbers binary search, data structures, implementation, two pointers	1500	x12543
1415F	Cakes for Clones dp	2900	x487
1415E	New Game Plus! constructive algorithms, greedy, math	2200	x2719
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5408
1415C	Bouncing Ball brute force, dp, implementation	1400	x10933
1415B	Repainting Street brute force, brute force, greedy	1100	x12182
1415A	Prison Break brute force, math	800	x15165
1413F	Roads and Ramen data structures, trees	2800	x779
1413E	Solo mid Oracle greedy, math, ternary search	2100	x2024
1413D	Shurikens data structures, greedy, implementation	1700	x6503
1413C	Perform Easily binary search, brute force, dp, implementation, sortings, two pointers	1900	x5721
1413B	A New Technique implementation	1100	x11717
1413A	Finding Sasuke constructive algorithms, math	800	x14762
1411G	No Game No Life bitmasks, games, math, matrices	2700	x664
1411F	The Thorny Path greedy, math	3000	x374
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1649
1411D	Grime Zoo brute force, greedy, implementation, strings	2100	x2523
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x7994
1411B	Fair Numbers brute force, number theory	1000	x19385
1411A	In-game Chat implementation	800	x20614
1409F	Subsequences of Length Two dp, strings	2100	x4456
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x7833
1409D	Decrease the Sum of Digits greedy, math	1500	x19414
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x23316
1409B	Minimum Product brute force, greedy, math	1100	x28997
1409A	Yet Another Two Integers Problem greedy, math	800	x66311
1408I	Bitwise Magic dp, math	3200	x174
1408H	Rainbow Triples binary search, data structures, flows, greedy	3300	x400
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x1046
1408F	Two Different constructive algorithms, divide and conquer	2300	x2374
1408E	Avoid Rainbow Cycles data structures, dsu, graphs, greedy, sortings, trees	2400	x1978
1408D	Searchlights binary search, brute force, data structures, dp, implementation, sortings, two pointers	2000	x4315
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x8851
1408B	Arrays Sum constructive algorithms, greedy, math	1400	x9956
1408A	Circle Coloring constructive algorithms	800	x12499
1407E	Egor in the Republic of Dagestan constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths	2500	x1697
1407D	Discrete Centrifugal Jumps data structures, dp, graphs	2200	x4901