Problemset - Codeforces

Problems

#	Name
2020A	Find Minimum Operations bitmasks, brute force, greedy, math, number theory	800	x21738
2019B	All Pairs Segments implementation, math	1200	x13732
2019A	Max Plus Size brute force, dp, greedy	800	x22722
2018F3	Speedbreaker Counting (Hard Version) dp, greedy, math	3100	x174
2018F2	Speedbreaker Counting (Medium Version) dp, greedy, math	3000	x167
2018F1	Speedbreaker Counting (Easy Version) combinatorics, dp, greedy, math	2900	x208
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3400	x110
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x146
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices, sortings	2200	x1575
2018C	Tree Pruning brute force, dfs and similar, greedy, sortings, trees	1700	x6106
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers	1900	x3906
2018A	Cards Partition 2-sat, brute force, greedy, implementation, math	1600	x10080
2014H	Robin Hood Archery data structures, divide and conquer, greedy, hashing	1900	x3458
2014G	Milky Days brute force, data structures, greedy, implementation	2200	x1259
2014F	Sheriff's Defense dfs and similar, dp, greedy, trees	2000	x3529
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x5548
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x11988
2014C	Robin Hood in Town binary search, greedy, math	1100	x21384
2014B	Robin Hood and the Major Oak math	800	x28071
2014A	Robin Helps greedy, implementation	800	x36739
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x102
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x470
2013E	Prefix GCD brute force, dp, greedy, math, number theory	2200	x3165
2013D	Minimize the Difference binary search, greedy	1900	x5975
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x11558
2013B	Battle for Survive constructive algorithms, greedy, math	900	x22848
2013A	Zhan's Blender constructive algorithms, math	800	x26979
2010C2	Message Transmission Error (hard version) hashing, string suffix structures, strings, two pointers	1700	x3090
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x6950
2010B	Three Brothers brute force, implementation, math	800	x19687
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x16663
2009G3	Yunli's Subarray Queries (extreme version) data structures, dp, implementation	2700	x328
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1196
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x3759
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x6456
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x13107
2009D	Satyam and Counting geometry, math	1400	x14222
2009C	The Legend of Freya the Frog implementation, math	1100	x25635
2009B	osu!mania brute force, implementation	800	x41407
2009A	Minimize! brute force, math	800	x50621
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x2885
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x5113
2008F	Sakurako's Box combinatorics, math, number theory	1400	x12445
2008E	Alternating String brute force, data structures, dp, greedy, implementation, strings	1500	x9923
2008D	Sakurako's Hobby dp, dsu, graphs, math	1100	x19029
2008C	Longest Good Array binary search, brute force, math	800	x30154
2008B	Square or Not brute force, math, strings	800	x28374
2008A	Sakurako's Exam brute force, constructive algorithms, greedy, math	800	x35043
2007C	Dora and C++ math, number theory	1500	x12171
2007B	Index and Maximum Value data structures, greedy	900	x21101
2007A	Dora's Set greedy, math, number theory	800	x22578
2006F	Dora's Paint brute force, combinatorics, constructive algorithms, graphs, implementation	3500	x117
2006E	Iris's Full Binary Tree brute force, data structures, dfs and similar, trees	3100	x218
2006D	Iris and Adjacent Products data structures, greedy, implementation, math	2600	x669
2006C	Eri and Expanded Sets data structures, divide and conquer, math, number theory, two pointers	2300	x1626
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x3298
2006A	Iris and Game on the Tree constructive algorithms, dfs and similar, games, graphs, greedy, trees	1700	x6720
2005E2	Subtangle Game (Hard Version) data structures, dp, games, greedy, implementation	2500	x789
2005E1	Subtangle Game (Easy Version) dp, games, greedy, implementation	2100	x2666
2005D	Alter the GCD binary search, brute force, data structures, divide and conquer, implementation, number theory	2400	x864
2005C	Lazy Narek dp, implementation, strings	1800	x6994
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x17155
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings	1000	x19819
2005A	Simple Palindrome combinatorics, constructive algorithms, greedy, math	900	x21567
2004G	Substring Compression data structures, dp, matrices	3200	x302
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x1170
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x4043
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x10689
2004C	Splitting Items games, greedy, sortings	1100	x23241
2004B	Game with Doors brute force, greedy	1000	x25965
2004A	Closest Point implementation, math	800	x30201
2003F	Turtle and Three Sequences brute force, data structures, dp, greedy, math, probabilities, two pointers	2800	x478
2003E2	Turtle and Inversions (Hard Version) brute force, data structures, divide and conquer, dp, greedy, math, two pointers	2700	x517
2003E1	Turtle and Inversions (Easy Version) brute force, divide and conquer, dp, greedy, math	2600	x722
2003D2	Turtle and a MEX Problem (Hard Version) dfs and similar, dp, graphs, greedy, implementation, math	2100	x3988
2003D1	Turtle and a MEX Problem (Easy Version) greedy, math	1500	x11099
2003C	Turtle and Good Pairs constructive algorithms, greedy, sortings, strings	1200	x18059
2003B	Turtle and Piggy Are Playing a Game 2 games, greedy, sortings	800	x25064
2003A	Turtle and Good Strings greedy, strings	800	x28850
2002H	Counting 101 greedy	3500	x73
2002G	Lattice Optimizing bitmasks, brute force, hashing, meet-in-the-middle	3400	x213
2002F2	Court Blue (Hard Version) brute force, dp, math, number theory	2800	x430
2002F1	Court Blue (Easy Version) brute force, dfs and similar, dp, math, number theory	2600	x814
2002E	Cosmic Rays brute force, data structures, dp	2300	x2428
2002D2	DFS Checker (Hard Version) binary search, data structures, dfs and similar, graphs, hashing, trees	2300	x2383
2002D1	DFS Checker (Easy Version) brute force, data structures, dfs and similar, graphs, hashing, trees	1900	x4318
2002C	Black Circles brute force, geometry, greedy, math	1200	x15015
2002B	Removals Game constructive algorithms, games	1000	x18764
2002A	Distanced Coloring constructive algorithms, implementation, math	800	x19364
2001E2	Deterministic Heap (Hard Version) combinatorics, dp, trees	2900	x223
2001E1	Deterministic Heap (Easy Version) combinatorics, dp, math, trees	2400	x1269
2001D	Longest Max Min Subsequence brute force, constructive algorithms, data structures, greedy, implementation	1900	x5012
2001C	Guess The Tree binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees	1500	x10664
2001B	Generate Permutation constructive algorithms	800	x23969
2001A	Make All Equal greedy, implementation	800	x29480
2000H	Ksyusha and the Loaded Set binary search, brute force, data structures, implementation	2200	x1652
2000G	Call During the Journey binary search, brute force, graphs, greedy, shortest paths	2100	x2334
2000F	Color Rows and Columns dp, greedy, implementation, math	1900	x5369
2000E	Photoshoot for Gorillas combinatorics, data structures, greedy, math	1400	x13231
2000D	Right Left Wrong greedy, implementation, two pointers	1200	x22896