Problemset - Codeforces

→ Pay attention

Before contest
Pinely Round 4 (Div. 1 + Div. 2)
16:05:37
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1992F	Valuable Cards brute force, dp, greedy, number theory, two pointers	1900	x4626
1992E	Novice's Mistake brute force, constructive algorithms, implementation, math, strings	1700	x7702
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x5034
1989C	Two Movies greedy, math	1400	x15748
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x13814
1987D	World is Mine dp, games	1800	x6058
1986F	Non-academic Problem dfs and similar, graphs, trees	1900	x3775
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x7587
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x13541
1985H1	Maximize the Largest Component (Easy Version) brute force, data structures, dfs and similar, dsu, graphs, implementation	1700	x4739
1985G	D-Function combinatorics, math, number theory	1600	x7959
1985F	Final Boss binary search, data structures	1500	x13128
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x6545
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x14701
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x7110
1983C	Have Your Cake and Eat It Too binary search, brute force, greedy, implementation	1400	x10950
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x6222
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4625
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12399
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3346
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x9328
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x12955
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x17092
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5897
1978D	Elections data structures, greedy, implementation, math	1600	x9814
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x13291
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x6043
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x9286
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x5354
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3234
1974E	Money Buys Happiness dp	1800	x7122
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13550
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x14525
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7600
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12910
1971G	XOUR data structures, dsu, sortings	1700	x8307
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x8940
1971E	Find the Car binary search, math, sortings	1500	x12755
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1120
1970E1	Trails (Easy) dp	1800	x1689
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1249
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2149
1970C1	Game on Tree (Easy) games	1400	x2797
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x929
1969D	Shop Game data structures, greedy, math, sortings	1900	x4089
1969C	Minimizing the Sum dp, implementation	1700	x7738
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3860
1968F	Equal XOR Segments binary search, data structures	1800	x4935
1968E	Cells Arrangement constructive algorithms	1600	x9554
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x13855
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x12153
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x11391
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6086
1965A	Everything Nim games, greedy, math, sortings	1400	x12446
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x228
1958D	Staircase *special problem	1600	x439
1958C	Firewood *special problem	1500	x611
1958B	Clock in the Pool *special problem, math	1400	x772
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4155
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8871
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12071
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4120
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6585
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8037
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x14388
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x19913
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5603
1951C	Ticket Hoarding greedy, math, sortings	1400	x10884
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4008
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8495
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13415
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1521
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1493
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2647
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8835
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15804
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4398
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x10031
1945F	Kirill and Mushrooms data structures, sortings	1900	x3928
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7622
1945D	Seraphim the Owl dp, greedy	1300	x13533
1943A	MEX Game 1 games, greedy	1300	x16776
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5877
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x10388
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5603
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8993
1938H	Pho Restaurant	1600	x1963
1938C	Bit Counting Sequence	1900	x1328
1937B	Binary Path dp, greedy, implementation	1300	x14173
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7011
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7812
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7736
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6404
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10586
1932F	Feed Cats data structures, dp, sortings	1900	x3796
1932E	Final Countdown implementation, math, number theory	1600	x7621
1932D	Card Game greedy, implementation	1400	x10823
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14902
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7524
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x14634

←