Problemset - Codeforces

→ Pay attention

Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
45:22:26
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1958B	Clock in the Pool *special problem, math	1400	x905
1958A	1-3-5 *special problem, dp	1100	x1987
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x444
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x502
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1280
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4535
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9729
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x18012
1957A	Stickogon constructive algorithms, greedy	800	x23389
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x366
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x888
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1470
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3950
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12977
1956B	Nene and the Card Game games, greedy	800	x21306
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x21767
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1265
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4579
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7158
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8696
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15554
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x21382
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x28091
1955A	Yogurt Sale math	800	x43806
1954F	Unique Strings combinatorics, dp, math	3100	x256
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2322
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6241
1954C	Long Multiplication greedy, math, number theory	1200	x19535
1954B	Make It Ugly implementation, math	1200	x18680
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x24279
1953A	Accuracy-Preserving Summation Algorithm *special problem
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x775
1952I	Dark Matter bitmasks, geometry		x539
1952H	Palindrome implementation, strings		x701
1952G	Mathematician Takeover binary search, dfs and similar, math		x1033
1952F	Grid brute force		x1752
1952E	Sweep Line combinatorics, games, math		x258
1952D	Are You a Procrastinator? implementation		x4620
1952C	They Have Fooled brute force, schedules		x2912
1952B	Is it stated? strings		x11173
1952A	Are You a Robot, Again? strings		x12481
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x76
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x284
1951G	Clacking Balls combinatorics, math, probabilities	3100	x337
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x768
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3665
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5441
1951C	Ticket Hoarding greedy, math, sortings	1400	x11741
1951B	Battle Cows binary search, data structures, greedy	1200	x14707
1951A	Dual Trigger constructive algorithms, greedy, math	900	x19824
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4424
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9232
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x14541
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x23320
1950C	Clock Conversion implementation, math	800	x40182
1950B	Upscaling implementation	800	x38297
1950A	Stair, Peak, or Neither? implementation	800	x53661
1949K	Make Triangle constructive algorithms, math	2800	x330
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x401
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1887
1949H	Division Avoidance greedy, math	3100	x127
1949G	Scooter graphs, greedy	2300	x794
1949F	Dating greedy, sortings, trees	2200	x1008
1949E	Damage per Second brute force, math	2900	x105
1949D	Funny or Scary? constructive algorithms	2600	x415
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1797
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x3349
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x115
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x701
1948F	Rare Coins combinatorics, math, probabilities	2500	x1337
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x3013
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9524
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x17014
1948B	Array Fix brute force, dp, greedy, implementation	1100	x23082
1948A	Special Characters brute force, constructive algorithms	800	x28644
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x982
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2580
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4768
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11056
1946B	Maximum Sum dp, greedy, math	1100	x20556
1946A	Median of an Array greedy, implementation, sortings	800	x26139
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x678
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x749
1945F	Kirill and Mushrooms data structures, sortings	1900	x4265
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8259
1945D	Seraphim the Owl dp, greedy	1300	x14575
1945C	Left and Right Houses brute force	1200	x15032
1945B	Fireworks math, number theory	900	x22834
1945A	Setting up Camp greedy, math	800	x27826
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16286
1944A	Destroying Bridges graphs, greedy, math	800	x23873
1943F	Minimum Hamming Distance dp	3500	x112
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x305
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x442
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x808
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1513
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2133
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3890
1943A	MEX Game 1 games, greedy	1300	x18111
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x96