Problemset - Codeforces

Please subscribe to the official Codeforces channel in Telegram via the link https://t.me/codeforces_official. ×

→ Pay attention

Before contest
Codeforces Round (Div. 2)
37:15:50
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11825
1801B	Buying gifts data structures, greedy, sortings	1800	x6036
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8370
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12422
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12474
1799C	Double Lexicographically Minimum greedy, strings	1700	x5676
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x9502
1798C	Candy Store greedy, math, number theory	1700	x7999
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7433
1796C	Maximum Set binary search, math	1600	x10115
1795D	Triangle Coloring combinatorics, math	1600	x8828
1795C	Tea Tasting binary search, data structures, implementation	1500	x11940
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5950
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6057
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x13712
1791F	Range Update Point Query binary search, brute force, data structures	1500	x11966
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14664
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8326
1787C	Remove the Bracket dp, greedy, math	1600	x6898
1783C	Yet Another Tournament binary search, greedy, sortings	1700	x9076
1781D	Many Perfect Squares brute force, math, number theory	1800	x5393
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7363
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4788
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7712
1779C	Least Prefix Sum data structures, greedy	1600	x12146
1778C	Flexible String bitmasks, brute force, strings	1600	x7957
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8235
1776L	Controllers binary search, math	1500	x5597
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3337
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6022
1775C	Interesting Sequence bitmasks, math	1600	x10099
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7662
1774B	Coloring constructive algorithms, greedy, math	1500	x11927
1773E	Easy Assembly greedy, sortings	1400	x4764
1772E	Permutation Game games	1700	x6618
1772D	Absolute Sorting constructive algorithms, math	1400	x15432
1771C	Hossam and Trainees greedy, math, number theory	1600	x9398
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x13670
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8418
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x375
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x865
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x6912
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9676
1766D	Lucky Chains math, number theory	1600	x8692
1765N	Number Reduction greedy	1500	x4617
1765K	Torus Path greedy, math	1500	x5569
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4039
1764C	Doremy's City Construction graphs, greedy	1400	x9253
1762C	Binary Strings are Fun combinatorics, math	1400	x9028
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9352
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7149
1760F	Quests binary search, greedy, sortings	1500	x11818
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3827
1759E	The Humanoid brute force, dp, sortings	1500	x10480
1759D	Make It Round brute force, number theory	1400	x12953
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7109
1758C	Almost All Multiples greedy, number theory	1400	x13316
1753B	Factorial Divisibility math, number theory	1600	x12455
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10070
1750D	Count GCD combinatorics, math, number theory	1800	x5734
1750C	Complementary XOR constructive algorithms, implementation	1400	x9420
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x13696
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x10832
1748B	Diverse Substrings brute force, implementation, strings	1400	x14786
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10598
1743D	Problem with Random Tests brute force, dp, greedy, probabilities	1700	x7475
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10340
1742F	Smaller constructive algorithms, greedy, strings	1500	x11270
1741E	Sending a Sequence Over the Network dp	1600	x11448
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4226
1740D	Knowledge Cards constructive algorithms, data structures	1500	x7924
1740C	Bricks and Bags constructive algorithms, games, greedy, sortings	1400	x10811
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8904
1738C	Even Number Addicts dp, games, greedy, math	1500	x10931
1737C	Ela and Crickets constructive algorithms, games, implementation, math	1500	x5657
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5404
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9741
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x6167
1733D1	Zero-One (Easy Version) constructive algorithms, greedy, math	1400	x13176
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8496
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5727
1731D	Valiant's New Map binary search, brute force, data structures, dp, two pointers	1700	x6954
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9261
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12307
1729E	Guess the Cycle Size interactive, probabilities	1800	x6882
1728D	Letter Picking constructive algorithms, dp, games, two pointers	1800	x7049
1728C	Digital Logarithm data structures, greedy, sortings	1400	x15612
1725M	Moving Both Hands dp, graphs, shortest paths	1800	x3015
1725H	Hot Black Hot White constructive algorithms, math	1800	x2548
1725G	Garage binary search, geometry, math	1500	x5740
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x10872
1722F	L-shapes dfs and similar, implementation	1700	x6725
1722E	Counting Rectangles brute force, data structures, dp, implementation	1600	x10456
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6491
1721C	Min-Max Array Transformation binary search, greedy, two pointers	1400	x13149
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5849
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x13033
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x5622
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8494
1714G	Path Prefixes binary search, data structures, dfs and similar, trees	1700	x7356