Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 973 (Div. 2)
13:58:58
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3598
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x10055
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x13800
1980A	Problem Generator math	800	x39231
1978D	Elections data structures, greedy, implementation, math	1600	x10782
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x14377
1978B	New Bakery binary search, greedy, math, ternary search	800	x21732
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x6505
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x17222
1977A	Little Nikita math	800	x30336
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x988
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x216
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x784
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x17274
1974A	Phone Desktop greedy, math	800	x32523
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x773
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x1860
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x8074
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x13585
1973A	Chess For Three brute force, dp, implementation, math	900	x23751
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x9583
1971E	Find the Car binary search, math, sortings	1500	x13714
1969D	Shop Game data structures, greedy, math, sortings	1900	x4379
1969A	Two Friends constructive algorithms, implementation, math	800	x19567
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1872
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x14493
1968A	Maximize? brute force, math, number theory	800	x33193
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x99
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x209
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1666
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3833
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x12886
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x12121
1965A	Everything Nim games, greedy, math, sortings	1400	x13255
1958B	Clock in the Pool *special problem, math	1400	x856
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1218
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4354
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9374
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x820
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1412
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3795
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12584
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4358
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6889
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x20717
1955A	Yogurt Sale math	800	x42155
1954F	Unique Strings combinatorics, dp, math	3100	x242
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2169
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5916
1954C	Long Multiplication greedy, math, number theory	1200	x18937
1954B	Make It Ugly implementation, math	1200	x18141
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x23563
1952G	Mathematician Takeover binary search, dfs and similar, math		x1011
1952E	Sweep Line combinatorics, games, math		x247
1951G	Clacking Balls combinatorics, math, probabilities	3100	x328
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3547
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5314
1951C	Ticket Hoarding greedy, math, sortings	1400	x11374
1951A	Dual Trigger constructive algorithms, greedy, math	900	x19246
1950C	Clock Conversion implementation, math	800	x38930
1949K	Make Triangle constructive algorithms, math	2800	x296
1949H	Division Avoidance greedy, math	3100	x115
1949E	Damage per Second brute force, math	2900	x98
1948F	Rare Coins combinatorics, math, probabilities	2500	x1276
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2476
1946B	Maximum Sum dp, greedy, math	1100	x20018
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x628
1945B	Fireworks math, number theory	900	x22164
1945A	Setting up Camp greedy, math	800	x27163
1944A	Destroying Bridges graphs, greedy, math	800	x23360
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1423
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3756
1942G	Bessie and Cards combinatorics, dp, math	2800	x428
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x682
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6043
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x10736
1942B	Bessie and MEX constructive algorithms, math	1100	x13672
1942A	Farmer John's Challenge constructive algorithms, math	800	x17050
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x29299
1941A	Rudolf and the Ticket brute force, math	800	x41849
1937A	Shuffle Party implementation, math	800	x22910
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x111
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2813
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7277
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1333
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8080
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6648
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x18523
1934A	Too Min Too Max greedy, math	800	x25095
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x958
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10999
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x19874
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x22329
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x32435
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x37732
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x1045
1932E	Final Countdown implementation, math, number theory	1600	x7968
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x15431
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2755
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x15470