Problemset - Codeforces

→ Pay attention

Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1915E	Romantic Glasses data structures, greedy, math	1300	x22398
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x22427
1914C	Quests greedy, math	1100	x24776
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x15228
1910A	Username *special problem, implementation	1100	x1797
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x17531
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x20462
1905B	Begginer's Zelda greedy, trees	1100	x16610
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x15899
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x12976
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x14013
1902B	Getting Points binary search, brute force, greedy	1100	x14636
1901B	Chip and Ribbon greedy, math	1100	x15134
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x11728
1899E	Queue Sort greedy, implementation, sortings	1300	x15773
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x13701
1899C	Yarik and Array dp, greedy, two pointers	1100	x21743
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x21158
1891B	Deja Vu brute force, math, sortings	1100	x18477
1889A	Qingshan Loves Strings 2 constructive algorithms, greedy, implementation	1300	x13378
1886B	Fear of the Dark binary search, geometry, math	1200	x16359
1884B	Haunted House binary search, greedy, math, two pointers	1100	x12822
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15627
1881D	Divide and Equalize math, number theory	1300	x17821
1881C	Perfect Square brute force, implementation	1200	x17258
1879C	Make it Alternating combinatorics, dp, greedy	1300	x17418
1877C	Joyboard math, number theory	1200	x11169
1874A	Jellyfish and Game brute force, games, greedy, implementation	1200	x17274
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15946
1873E	Building an Aquarium binary search, sortings	1100	x27670
1872D	Plus Minus Permutation math	1200	x24699
1872C	Non-coprime Split math, number theory	1100	x23674
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11647
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14327
1869B	2D Traveling geometry, math, shortest paths, sortings	1100	x16535
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x12146
1867C	Salyg1n and the MEX Game constructive algorithms, data structures, games, greedy, interactive	1300	x11393
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16890
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13669
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15480
1863C	MEX Repetition implementation, math	1100	x14155
1863B	Split Sort greedy, math, sortings	1100	x15410
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17440
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x21037
1860B	Fancy Coins binary search, brute force, greedy, math	1200	x17120
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x17146
1857D	Strong Vertices math, sortings, trees	1300	x20025
1857C	Assembly via Minimums greedy, sortings	1200	x26868
1857B	Maximum Rounding greedy, implementation, math	1100	x23212
1853B	Fibonaccharsis binary search, brute force, math	1200	x17592
1851D	Prefix Permutation Sums implementation, math	1300	x15420
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x19660
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x23893
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x15507
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x17272
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x19704
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x19327
1844C	Particles dp, greedy, implementation, math	1300	x15918
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x18334
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17438
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22624
1839C	Insert Zero and Invert Prefix constructive algorithms	1300	x12106
1839B	Lamps greedy, sortings	1100	x15255
1838B	Minimize Permutation Subarrays constructive algorithms, math	1100	x16539
1836B	Astrophysicists greedy, math	1100	x12716
1834C	Game with Reversing games, greedy, math, strings	1200	x13462
1832C	Contrast Value greedy, implementation	1200	x21435
1832B	Maximum Sum brute force, sortings, two pointers	1100	x22676
1829F	Forever Winter dfs and similar, graphs, math	1300	x17990
1829E	The Lakes dfs and similar, dsu, graphs, implementation	1100	x20447
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x19443
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13767
1826B	Lunatic Never Content math, number theory	1100	x18160
1826A	Trust Nobody brute force, greedy, implementation, sortings	1200	x15403
1823C	Strongly Composite greedy, math, number theory	1300	x12436
1822D	Super-Permutation constructive algorithms, math	1200	x16953
1821C	Tear It Apart brute force, implementation, math, strings	1300	x14488
1821B	Sort the Subarray brute force, greedy	1100	x19016
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x15092
1819A	Constructive Problem brute force, greedy	1300	x12900
1815A	Ian and Array Sorting greedy, math	1300	x14298
1811C	Restore the Array constructive algorithms, greedy	1100	x20117
1810C	Make It Permutation brute force, greedy, sortings	1300	x14714
1808B	Playing in a Casino math, sortings	1200	x17504
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19760
1807G1	Subsequence Addition (Easy Version) brute force, data structures, dp, greedy, implementation, sortings	1100	x19333
1807E	Interview binary search, implementation, interactive	1300	x13271
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x24143
1800C2	Powering the Hero (hard version) data structures, greedy	1100	x22986
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x11466
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x16390
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x14164
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x21067
1793B	Fedya and Array constructive algorithms, math	1100	x15934
1792B	Stand-up Comedian greedy, math	1200	x21632
1791G1	Teleporters (Easy Version) greedy, sortings	1100	x23317
1791E	Negatives and Positives dp, greedy, sortings	1100	x29209
1790D	Matryoshkas data structures, greedy, sortings	1200	x20807
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x17469
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x20239