Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 3)
34:37:28
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1946B	Maximum Sum dp, greedy, math	1100	x17592
1946A	Median of an Array greedy, implementation, sortings	800	x23204
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x469
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x610
1945F	Kirill and Mushrooms data structures, sortings	1900	x3501
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x6793
1945D	Seraphim the Owl dp, greedy	1300	x11837
1945C	Left and Right Houses brute force	1200	x12513
1945B	Fireworks math, number theory	900	x19241
1945A	Setting up Camp greedy, math	800	x24226
1944B	Equal XOR bitmasks, constructive algorithms	1100	x14001
1944A	Destroying Bridges graphs, greedy, math	800	x20857
1943F	Minimum Hamming Distance dp	3500	x72
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x212
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x338
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x566
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1203
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1743
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3175
1943A	MEX Game 1 games, greedy	1300	x14965
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x57
1942G	Bessie and Cards combinatorics, dp, math	2800	x357
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x542
1942E	Farm Game combinatorics, games	2300	x1411
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2371
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5393
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x9330
1942B	Bessie and MEX constructive algorithms, math	1100	x12064
1942A	Farmer John's Challenge constructive algorithms, math	800	x15372
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x2886
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5103
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8026
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16373
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x29321
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26100
1941A	Rudolf and the Ticket brute force, math	800	x38530
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x123
1940C	Burenka and Pether *special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees		x32
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x173
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1939D	Big Persimmon *special problem, dp, games		x59
1939C	More Gifts *special problem, dfs and similar, two pointers		x272
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x208
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1938M	Zig-zag	3500	x44
1938L	XOR Operations	2800	x245
1938K	Tree Quiz	2400	x527
1938J	There and Back Again	2100	x1102
1938I	Symmetric Boundary	2800	x51
1938H	Pho Restaurant	1600	x1842
1938G	Personality Test	2300	x861
1938F	Forming Groups	2400	x632
1938E	Duplicates	2200	x848
1938D	Bánh Bò	3300	x77
1938C	Bit Counting Sequence	1900	x1239
1938B	Attraction Score	3000	x146
1938A	Antiparticle Antiphysics	3500	x36
1937B	Binary Path dp, greedy, implementation	1300	x12933
1937A	Shuffle Party implementation, math	800	x21295
1936F	Grand Finale: Circles binary search, geometry	3300	x65
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x94
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x404
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1062
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2384
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6494
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x385
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1151
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7249
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7053
1935B	Informatics in MAC constructive algorithms	1200	x16274
1935A	Entertainment in MAC constructive algorithms, strings	800	x25274
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x181
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1174
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3035
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x5986
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x16468
1934A	Too Min Too Max greedy, math	800	x23190
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x853
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2171
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9575
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17559
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20277
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29649
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x35144
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x864
1932F	Feed Cats data structures, dp, sortings	1900	x3330
1932E	Final Countdown implementation, math, number theory	1600	x6685
1932D	Card Game greedy, implementation	1400	x9768
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13481
1932B	Chaya Calendar number theory	1100	x18200
1932A	Thorns and Coins dp, greedy, implementation	800	x26411
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2416
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x6873
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13178
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15668
1931C	Make Equal Again brute force, greedy, math	1000	x25850
1931B	Make Equal greedy	800	x29814
1931A	Recovering a Small String brute force, strings	800	x33356
1930I	Counting Is Fun combinatorics	3500	x49
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x118