Problemset - Codeforces

→ Pay attention

Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
11:46:50
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
2035D	Yet Another Real Number Problem binary search, data structures, divide and conquer, greedy, implementation, math	1800	x4394
2033F	Kosuke's Sloth brute force, math, number theory	1800	x5187
2032D	Genokraken constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers	1800	x4496
2025D	Attribute Checks brute force, data structures, dp, implementation, math, two pointers	1800	x5872
2022C	Gerrymandering dp, implementation	1800	x3852
2020D	Connect the Dots brute force, dp, dsu, graphs, math, trees	1800	x5662
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x5588
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x5152
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x3328
2005C	Lazy Narek dp, implementation, strings	1800	x7023
1995C	Squaring brute force, constructive algorithms, greedy, implementation, math, number theory	1800	x8587
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation	1800	x6326
1987D	World is Mine dp, games	1800	x7183
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5369
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6665
1974E	Money Buys Happiness dp	1800	x8082
1970E1	Trails (Easy) dp	1800	x2228
1968F	Equal XOR Segments binary search, data structures	1800	x5545
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6772
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7165
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6242
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1889
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x6101
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8322
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8267
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x4166
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6905
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7811
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x6544
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2570
1910D	Remove and Add *special problem, greedy	1800	x358
1907F	Shift and Reverse greedy, sortings	1800	x4972
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x4515
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x6450
1870D	Prefix Purchase greedy, implementation, sortings	1800	x7090
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5874
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6372
1861D	Sorting By Multiplication dp, greedy	1800	x6889
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x7089
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5415
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4547
1852A	Ntarsis' Set binary search, math, number theory	1800	x8160
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5957
1848C	Vika and Price Tags math, number theory	1800	x6372
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3163
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x7120
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7929
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5391
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7924
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5468
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4693
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6398
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6753
1801B	Buying gifts data structures, greedy, sortings	1800	x6384
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x6285
1781D	Many Perfect Squares brute force, math, number theory	1800	x5559
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x5009
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6372
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x384
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x7263
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3970
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7399
1750D	Count GCD combinatorics, math, number theory	1800	x6001
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4391
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x6377
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5992
1729E	Guess the Cycle Size interactive, probabilities	1800	x7109
1728D	Letter Picking constructive algorithms, dp, games, two pointers	1800	x7333
1725M	Moving Both Hands dp, graphs, shortest paths	1800	x3176
1725H	Hot Black Hot White constructive algorithms, math	1800	x2654
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6710
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x6057
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x5844
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5724
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8919
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6381
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5873
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6673
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x5394
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x5097
1666L	Labyrinth dfs and similar, graphs	1800	x3165
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x3218
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6488
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7820
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6306
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x5797
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6617
1619D	New Year's Problem binary search, greedy, sortings	1800	x7638
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4727
1611F	ATM and Students binary search, data structures, two pointers	1800	x6510
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5428
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5694
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2602
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x9126
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x335
1571C	Rhyme *special problem, implementation	1800	x380
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x8102
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x7058
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5824
1554D	Diane constructive algorithms, greedy, strings	1800	x9553

←