Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 973 (Div. 2)
16:09:45
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
2010B	Three Brothers brute force, implementation, math	800	x14852
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x12344
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x5364
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x10890
2009D	Satyam and Counting geometry, math	1400	x12030
2009C	The Legend of Freya the Frog implementation, math	1100	x21673
2009A	Minimize! brute force, math	800	x42372
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x2360
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x4224
2008F	Sakurako's Box combinatorics, math, number theory	1400	x10938
2008D	Sakurako's Hobby dp, dsu, graphs, math	1100	x17096
2008C	Longest Good Array binary search, brute force, math	800	x26788
2008B	Square or Not brute force, math, strings	800	x25613
2008A	Sakurako's Exam brute force, constructive algorithms, greedy, math	800	x31047
2007C	Dora and C++ math, number theory	1500	x10496
2007A	Dora's Set greedy, math, number theory	800	x20650
2006D	Iris and Adjacent Products data structures, greedy, implementation, math	2600	x544
2006C	Eri and Expanded Sets data structures, divide and conquer, math, number theory, two pointers	2300	x1378
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x2741
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings		x13998
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings		x16071
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x988
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x3694
2004A	Closest Point implementation, math	800	x28435
2003F	Turtle and Three Sequences brute force, data structures, dp, greedy, math, probabilities, two pointers	2800	x346
2003E2	Turtle and Inversions (Hard Version) brute force, data structures, divide and conquer, dp, greedy, math, two pointers	2700	x451
2003E1	Turtle and Inversions (Easy Version) brute force, divide and conquer, dp, greedy, math	2600	x638
2003D2	Turtle and a MEX Problem (Hard Version) dfs and similar, dp, graphs, greedy, implementation, math	2100	x3638
2003D1	Turtle and a MEX Problem (Easy Version) greedy, math	1500	x10219
2002F2	Court Blue (Hard Version) brute force, dp, math, number theory	2800	x389
2002F1	Court Blue (Easy Version) brute force, dfs and similar, dp, math, number theory	2600	x763
2002C	Black Circles brute force, geometry, greedy, math	1200	x13997
2002A	Distanced Coloring constructive algorithms, implementation, math	800	x18519
2001E1	Deterministic Heap (Easy Version) combinatorics, dp, math, trees	2400	x1119
2000F	Color Rows and Columns dp, greedy, implementation, math	1900	x4908
2000E	Photoshoot for Gorillas combinatorics, data structures, greedy, math	1400	x12303
2000A	Primary Task implementation, math, strings	800	x35010
1999F	Expected Median combinatorics, math	1500	x9536
1999E	Triple Operations dp, implementation, math	1300	x17195
1999A	A+B Again? implementation, math	800	x47529
1998B	Minimize Equal Sum Subarrays constructive algorithms, math, number theory	1000	x22340
1998A	Find K Distinct Points with Fixed Center constructive algorithms, implementation, math	800	x22975
1997F	Chips on a Line brute force, combinatorics, dp, greedy, math	2700	x830
1996F	Bomb binary search, greedy, math	1900	x4331
1996E	Decode combinatorics, data structures, implementation, math	1600	x8921
1996D	Fun binary search, brute force, combinatorics, math, number theory	1500	x14834
1996A	Legs binary search, math, ternary search	800	x39819
1995C	Squaring brute force, constructive algorithms, greedy, implementation, math, number theory	1800	x7876
1995B2	Bouquet (Hard Version) binary search, data structures, greedy, math, sortings, two pointers	1700	x8278
1995A	Diagonals brute force, greedy, implementation, math	800	x23447
1994H	Fortnite combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings	3500	x490
1994G	Minecraft bitmasks, brute force, dp, graphs, math	2600	x1154
1994E	Wooden Game bitmasks, greedy, math, trees	2000	x4199
1994D	Funny Game constructive algorithms, dsu, graphs, greedy, math, number theory, trees	1900	x5409
1994B	Fun Game bitmasks, constructive algorithms, greedy, math	1100	x15867
1993F2	Dyn-scripted Robot (Hard Version) chinese remainder theorem, math, number theory	2800	x359
1993F1	Dyn-scripted Robot (Easy Version) brute force, chinese remainder theorem, constructive algorithms, math, number theory	2400	x913
1993C	Light Switches implementation, math	1400	x12844
1992G	Ultra-Meow combinatorics, dp, math	2000	x2894
1992E	Novice's Mistake brute force, constructive algorithms, implementation, math, strings	1700	x8738
1992C	Gorilla and Permutation constructive algorithms, math	900	x27926
1992B	Angry Monk greedy, math, sortings	800	x32946
1992A	Only Pluses brute force, constructive algorithms, greedy, math, sortings	800	x39322
1991H	Prime Split Game bitmasks, dp, fft, games, math, number theory	3300	x256
1991F	Triangle Formation brute force, greedy, implementation, math, sortings	2200	x2145
1991D	Prime XOR Coloring bitmasks, constructive algorithms, graphs, greedy, math, number theory	1900	x6104
1991C	Absolute Zero constructive algorithms, greedy, math	1300	x13605
1990C	Mad MAD Sum brute force, greedy, math	1500	x10899
1989E	Distance to Different combinatorics, dp, math	2300	x1841
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x5667
1989C	Two Movies greedy, math	1400	x17661
1988F	Heartbeat combinatorics, dp, fft, math	3000	x180
1988A	Split the Multiset brute force, greedy, implementation, math	900	x22085
1987A	Upload More RAM greedy, math	800	x24339
1986G2	Permutation Problem (Hard Version) brute force, data structures, hashing, math, number theory	2500	x1010
1986G1	Permutation Problem (Simple Version) binary search, brute force, combinatorics, data structures, math, number theory	2200	x1398
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x8365
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x14672
1986A	X Axis brute force, geometry, math, sortings	800	x38862
1985G	D-Function combinatorics, math, number theory	1600	x8902
1985E	Secret Box brute force, combinatorics, math	1200	x19290
1985D	Manhattan Circle implementation, math	900	x33252
1985B	Maximum Multiple Sum brute force, math, number theory	800	x44210
1984F	Reconstruction brute force, dp, math	2500	x894
1984D	''a'' String Problem brute force, hashing, implementation, math, string suffix structures, strings	2000	x3111
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x7034
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x15908
1984B	Large Addition implementation, math	1100	x17703
1983E	I Love Balls combinatorics, math, probabilities	2300	x1891
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x7864
1983B	Corner Twist constructive algorithms, greedy, implementation, math	1200	x15549
1983A	Array Divisibility constructive algorithms, math	800	x24928
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1499
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x6819
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x16350
1982A	Soccer greedy, implementation, math, sortings	800	x24259
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5090
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x13246
1981A	Turtle and Piggy Are Playing a Game brute force, greedy, math	800	x21744
1980F2	Field Division (hard version) math, sortings	2400	x943

←