Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x5706
1971E	Find the Car binary search, math, sortings	1500	x8299
1969D	Shop Game data structures, greedy, math, sortings	1900	x3244
1969A	Two Friends constructive algorithms, implementation, math	800	x15616
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1341
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x11200
1968A	Maximize? brute force, math, number theory	800	x26358
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x51
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x117
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1243
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x2980
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x9610
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x8959
1965A	Everything Nim games, greedy, math, sortings	1400	x10066
1958B	Clock in the Pool *special problem, math	1400	x563
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1001
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3620
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x7610
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x660
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1210
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3218
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x10701
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3476
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x5907
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x17866
1955A	Yogurt Sale math	800	x36614
1954F	Unique Strings combinatorics, dp, math	3100	x204
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1795
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x4912
1954C	Long Multiplication greedy, math, number theory	1200	x15793
1954B	Make It Ugly implementation, math	1200	x15545
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x20510
1952G	Mathematician Takeover binary search, dfs and similar, math		x928
1952E	Sweep Line combinatorics, games, math		x210
1951G	Clacking Balls combinatorics, math, probabilities	3100	x255
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3024
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x4707
1951C	Ticket Hoarding greedy, math, sortings	1400	x9657
1951A	Dual Trigger constructive algorithms, greedy, math	900	x16514
1950C	Clock Conversion implementation, math	800	x35226
1949K	Make Triangle constructive algorithms, math	2800	x233
1949H	Division Avoidance greedy, math	3100	x74
1949E	Damage per Second brute force, math	2900	x83
1948F	Rare Coins combinatorics, math, probabilities	2500	x1150
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2108
1946B	Maximum Sum dp, greedy, math	1100	x17967
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x495
1945B	Fireworks math, number theory	900	x19751
1945A	Setting up Camp greedy, math	800	x24755
1944A	Destroying Bridges graphs, greedy, math	800	x21262
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1256
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3312
1942G	Bessie and Cards combinatorics, dp, math	2800	x371
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x559
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5490
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x9542
1942B	Bessie and MEX constructive algorithms, math	1100	x12277
1942A	Farmer John's Challenge constructive algorithms, math	800	x15587
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26498
1941A	Rudolf and the Ticket brute force, math	800	x39011
1937A	Shuffle Party implementation, math	800	x21493
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x96
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2456
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6582
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1173
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7349
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6055
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x16707
1934A	Too Min Too Max greedy, math	800	x23436
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x866
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9747
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17861
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20561
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30003
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x35522
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x882
1932E	Final Countdown implementation, math, number theory	1600	x6827
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13734
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2454
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13394
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15895
1931C	Make Equal Again brute force, greedy, math	1000	x26139
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x986
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13660
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1633
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1517
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4182
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13289
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x23816
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x28943
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x210
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1552
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3757
1928C	Physical Education Lesson brute force, math, number theory	1600	x7501
1928A	Rectangle Cutting geometry, math	800	x21223
1927G	Paint Charges data structures, dp, greedy, math	2300	x1494
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x12449
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25635
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10085
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3232

←