Problemset - Codeforces

Codeforces and Polygon may be unavailable from December 6, 19:00 (UTC) to December 6, 21:00 (UTC) due to technical maintenance. ×

→ Pay attention

Before contest
Codeforces Round 991 (Div. 3)
12:29:42
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
2045C	Saraga greedy, strings	1400	x1343
2038L	Bridge Renovation brute force, dp, greedy, math, two pointers	1400	x3859
2038C	DIY data structures, geometry, greedy, sortings	1400	x3412
2038A	Bonus Project games, greedy	1400	x2843
2035C	Alya and Permutation bitmasks, constructive algorithms, math	1400	x8161
2033E	Sakurako, Kosuke, and the Permutation brute force, data structures, dfs and similar, dsu, graphs, greedy, math	1400	x10091
2033C	Sakurako's Field Trip dp, greedy, two pointers	1400	x12874
2032C	Trinity binary search, math, sortings, two pointers	1400	x11574
2028B	Alice's Adventures in Permuting binary search, implementation, math	1400	x9016
2020C	Bitwise Balancing bitmasks, hashing, implementation, math, schedules, ternary search	1400	x14508
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x12186
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x11696
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x7061
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x13393
2009D	Satyam and Counting geometry, math	1400	x14514
2008F	Sakurako's Box combinatorics, math, number theory	1400	x12594
2000E	Photoshoot for Gorillas combinatorics, data structures, greedy, math	1400	x13360
1993C	Light Switches implementation, math	1400	x13707
1989C	Two Movies greedy, math	1400	x18688
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x15305
1983C	Have Your Cake and Eat It Too binary search, brute force, greedy, implementation	1400	x12661
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x14426
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x14940
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x15912
1970C1	Game on Tree (Easy) games	1400	x3553
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x13416
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x12601
1965A	Everything Nim games, greedy, math, sortings	1400	x13888
1958B	Clock in the Pool *special problem, math	1400	x914
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15608
1951C	Ticket Hoarding greedy, math, sortings	1400	x11780
1932D	Card Game greedy, implementation	1400	x11646
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x16010
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x16311
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x15174
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x14261
1923C	Find B constructive algorithms, greedy	1400	x15407
1919C	Grouping Increases data structures, dp, greedy	1400	x19490
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x14253
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x12659
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x12442
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x11377
1907D	Jumping Through Segments binary search, constructive algorithms	1400	x14696
1905C	Largest Subsequence greedy, strings	1400	x12514
1904C	Array Game binary search, brute force, data structures, sortings, two pointers	1400	x13721
1903C	Theofanis' Nightmare constructive algorithms, greedy	1400	x12216
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x12190
1896C	Matching Arrays binary search, constructive algorithms, greedy, sortings	1400	x9819
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x11415
1893A	Anonymous Informant brute force, dfs and similar, graphs, implementation	1400	x12591
1883G1	Dances (Easy version) binary search, greedy, two pointers	1400	x11426
1883F	You Are So Beautiful data structures	1400	x9747
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x13269
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11948
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7862
1863D	Two-Colored Dominoes constructive algorithms, greedy	1400	x9631
1860C	Game on Permutation data structures, dp, games, greedy	1400	x13550
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14330
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x13045
1845C	Strong Password binary search, dp, greedy, strings	1400	x14495
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12429
1840D	Wooden Toy Festival binary search, greedy, sortings	1400	x13961
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x14749
1837D	Bracket Coloring constructive algorithms, greedy	1400	x15201
1833D	Flipper brute force, constructive algorithms, greedy	1400	x13493
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x13905
1824A	LuoTianyi and the Show greedy, implementation	1400	x11419
1805C	Place for a Selfie binary search, data structures, geometry, math	1400	x12715
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x13035
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15363
1773E	Easy Assembly greedy, sortings	1400	x4995
1772D	Absolute Sorting constructive algorithms, math	1400	x16181
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14772
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x885
1764C	Doremy's City Construction graphs, greedy	1400	x9493
1762C	Binary Strings are Fun combinatorics, math	1400	x9266
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9679
1759D	Make It Round brute force, number theory	1400	x13952
1758C	Almost All Multiples greedy, number theory	1400	x13799
1750C	Complementary XOR constructive algorithms, implementation	1400	x9636
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x14140
1748B	Diverse Substrings brute force, implementation, strings	1400	x15179
1740C	Bricks and Bags constructive algorithms, games, greedy, sortings	1400	x11146
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9991
1733D1	Zero-One (Easy Version) constructive algorithms, greedy, math	1400	x13637
1728C	Digital Logarithm data structures, greedy, sortings	1400	x16067
1721C	Min-Max Array Transformation binary search, greedy, two pointers	1400	x13472
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x13359
1714E	Add Modulo 10 brute force, math, number theory	1400	x16959
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x15025
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x13440
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x17405
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14509
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11719
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x18217
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15790
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12435
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x14927
1679C	Rooks Defenders data structures, implementation	1400	x10442
1676H1	Maximum Crossings (Easy Version) brute force	1400	x14267

←