Problemset - Codeforces

→ Pay attention

Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
10:20:57
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1798C	Candy Store greedy, math, number theory	1700	x8289
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x4033
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7770
1796C	Maximum Set binary search, math	1600	x10571
1795D	Triangle Coloring combinatorics, math	1600	x9320
1795C	Tea Tasting binary search, data structures, implementation	1500	x12788
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3628
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x14131
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x6285
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6332
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x14311
1791G2	Teleporters (Hard Version) binary search, greedy, sortings	1900	x4844
1791F	Range Update Point Query binary search, brute force, data structures	1500	x12628
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15337
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8660
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17460
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3430
1787C	Remove the Bracket dp, greedy, math	1600	x7166
1786B	Cake Assembly Line brute force, sortings	1300	x9042
1784B	Letter Exchange constructive algorithms	1900	x3359
1783C	Yet Another Tournament binary search, greedy, sortings	1700	x9422
1781D	Many Perfect Squares brute force, math, number theory	1800	x5559
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7735
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x5010
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7985
1779C	Least Prefix Sum data structures, greedy	1600	x12511
1778C	Flexible String bitmasks, brute force, strings	1600	x8362
1778B	The Forbidden Permutation greedy, math	1300	x13394
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3556
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8748
1776L	Controllers binary search, math	1500	x6236
1776H	Beppa and SwerChat two pointers	1300	x6502
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3524
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6372
1775C	Interesting Sequence bitmasks, math	1600	x10655
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x14157
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3531
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7980
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x12119
1774B	Coloring constructive algorithms, greedy, math	1500	x12403
1773K	King's Puzzle constructive algorithms	1900	x1443
1773E	Easy Assembly greedy, sortings	1400	x4957
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1571
1772E	Permutation Game games	1700	x6844
1772D	Absolute Sorting constructive algorithms, math	1400	x16138
1771C	Hossam and Trainees greedy, math, number theory	1600	x9816
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14713
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8661
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x384
1769C2	Подкрутка II *special problem, dp	1300	x975
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x884
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x7263
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14314
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x10018
1766D	Lucky Chains math, number theory	1600	x9023
1766C	Hamiltonian Wall dp, implementation	1300	x13743
1765N	Number Reduction greedy	1500	x4924
1765K	Torus Path greedy, math	1500	x5910
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4235
1764C	Doremy's City Construction graphs, greedy	1400	x9476
1762C	Binary Strings are Fun combinatorics, math	1400	x9253
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9660
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7453
1760F	Quests binary search, greedy, sortings	1500	x12433
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4535
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3970
1759E	The Humanoid brute force, dp, sortings	1500	x10961
1759D	Make It Round brute force, number theory	1400	x13889
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7399
1758C	Almost All Multiples greedy, number theory	1400	x13770
1753B	Factorial Divisibility math, number theory	1600	x12985
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10479
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x15095
1750D	Count GCD combinatorics, math, number theory	1800	x6002
1750C	Complementary XOR constructive algorithms, implementation	1400	x9620
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5623
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x14095
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11246
1748B	Diverse Substrings brute force, implementation, strings	1400	x15145
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4721
1746D	Paths on the Tree dfs and similar, dp, greedy, sortings, trees	1900	x4656
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12893
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5670
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x11011
1743D	Problem with Random Tests brute force, dp, greedy, probabilities	1700	x7660
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10921
1742F	Smaller constructive algorithms, greedy, strings	1500	x11894
1741E	Sending a Sequence Over the Network dp	1600	x12589
1741D	Masha and a Beautiful Tree dfs and similar, divide and conquer, graphs, sortings, trees	1300	x15404
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4391
1740D	Knowledge Cards constructive algorithms, data structures	1500	x8172
1740C	Bricks and Bags constructive algorithms, games, greedy, sortings	1400	x11124
1739D	Reset K Edges binary search, data structures, dfs and similar, graphs, greedy, trees	1900	x5231
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x9164
1738D	Permutation Addicts constructive algorithms, data structures, dfs and similar, dsu, graphs, trees	1900	x3457
1738C	Even Number Addicts dp, games, greedy, math	1500	x11294
1737C	Ela and Crickets constructive algorithms, games, implementation, math	1500	x5801
1737B	Ela's Fitness and the Luxury Number binary search, implementation, math	1300	x9454
1736C1	Good Subarrays (Easy Version) binary search, data structures, schedules, two pointers	1300	x15196
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5555