Problemset - Codeforces

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Codeforces Round (Div. 1 + Div. 2)
2 weeks

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Problems

#	Name
2018F1	Speedbreaker Counting (Easy Version) combinatorics, dp, greedy, math	2900	x350
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3400	x215
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x249
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices, sortings	2200	x2277
2018C	Tree Pruning brute force, dfs and similar, greedy, sortings, trees	1700	x10482
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers	1900	x5377
2018A	Cards Partition 2-sat, brute force, greedy, implementation, math	1600	x12961
2014H	Robin Hood Archery data structures, divide and conquer, greedy, hashing	1900	x6258
2014G	Milky Days brute force, data structures, greedy, implementation	2200	x1877
2014F	Sheriff's Defense dfs and similar, dp, greedy, trees	2000	x5553
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x9649
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x16468
2014C	Robin Hood in Town binary search, greedy, math	1100	x28488
2014B	Robin Hood and the Major Oak math	800	x34013
2014A	Robin Helps greedy, implementation	800	x46917
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x172
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x691
2013E	Prefix GCD brute force, dp, greedy, math, number theory	2200	x4477
2013D	Minimize the Difference binary search, greedy	1900	x7726
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x14995
2013B	Battle for Survive constructive algorithms, greedy, math	900	x28930
2013A	Zhan's Blender constructive algorithms, math	800	x31699
2011I	Stack and Queue *special problem, data structures, divide and conquer		x24
2011H	Strange Matrix *special problem, graphs, greedy		x59
2011G	Removal of a Permutation *special problem		x51
2011F	Good Subarray *special problem, data structures, greedy		x132
2011E	Rock-Paper-Scissors Bot *special problem, greedy, strings		x185
2011D	Among Wolves *special problem		x285
2011C	Split the Expression *special problem		x382
2011B	Shuffle *special problem		x679
2011A	Problem Solving *special problem		x1142
2010C2	Message Transmission Error (hard version) hashing, string suffix structures, strings, two pointers	1700	x4858
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x9548
2010B	Three Brothers brute force, implementation, math	800	x25290
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x21767
2009G3	Yunli's Subarray Queries (extreme version) data structures, dp, implementation	2700	x567
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1882
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x5748
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x8753
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x18395
2009D	Satyam and Counting geometry, math	1400	x19448
2009C	The Legend of Freya the Frog implementation, math	1100	x34136
2009B	osu!mania brute force, implementation	800	x54852
2009A	Minimize! brute force, math	800	x76740
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x3734
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x6890
2008F	Sakurako's Box combinatorics, math, number theory	1400	x16185
2008E	Alternating String brute force, data structures, dp, greedy, implementation, strings	1500	x14201
2008D	Sakurako's Hobby dp, dsu, graphs, math	1100	x24060
2008C	Longest Good Array binary search, brute force, math	800	x37391
2008B	Square or Not brute force, math, strings	800	x33447
2008A	Sakurako's Exam brute force, constructive algorithms, greedy, math	800	x42662
2007C	Dora and C++ math, number theory	1500	x16574
2007B	Index and Maximum Value data structures, greedy	900	x26179
2007A	Dora's Set greedy, math, number theory	800	x25550
2006F	Dora's Paint brute force, combinatorics, constructive algorithms, graphs, implementation	3500	x181
2006E	Iris's Full Binary Tree brute force, data structures, dfs and similar, trees	3100	x332
2006D	Iris and Adjacent Products data structures, greedy, implementation, math	2600	x1025
2006C	Eri and Expanded Sets data structures, divide and conquer, math, number theory, two pointers	2300	x2127
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x4486
2006A	Iris and Game on the Tree constructive algorithms, dfs and similar, games, graphs, greedy, trees	1700	x9989
2005E2	Subtangle Game (Hard Version) data structures, dp, games, greedy, implementation	2500	x1107
2005E1	Subtangle Game (Easy Version) dp, games, greedy, implementation	2100	x3409
2005D	Alter the GCD binary search, brute force, data structures, divide and conquer, implementation, number theory	2400	x1302
2005C	Lazy Narek dp, implementation, strings	1800	x8929
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x22428
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings	1000	x25374
2005A	Simple Palindrome combinatorics, constructive algorithms, greedy, math	900	x26945
2004G	Substring Compression data structures, dp, matrices	3200	x429
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x1461
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x5276
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x13663
2004C	Splitting Items games, greedy, sortings	1100	x27686
2004B	Game with Doors brute force, greedy	1000	x32489
2004A	Closest Point implementation, math	800	x34117
2003F	Turtle and Three Sequences brute force, data structures, dp, greedy, math, probabilities, two pointers	2800	x857
2003E2	Turtle and Inversions (Hard Version) brute force, data structures, divide and conquer, dp, greedy, math, two pointers	2700	x668
2003E1	Turtle and Inversions (Easy Version) brute force, divide and conquer, dp, greedy, math	2600	x916
2003D2	Turtle and a MEX Problem (Hard Version) dfs and similar, dp, graphs, greedy, implementation, math	2100	x4781
2003D1	Turtle and a MEX Problem (Easy Version) greedy, math	1500	x13796
2003C	Turtle and Good Pairs constructive algorithms, greedy, sortings, strings	1200	x22256
2003B	Turtle and Piggy Are Playing a Game 2 games, greedy, sortings	800	x27812
2003A	Turtle and Good Strings greedy, strings	800	x33052
2002H	Counting 101 greedy	3500	x107
2002G	Lattice Optimizing bitmasks, brute force, hashing, meet-in-the-middle	3400	x293
2002F2	Court Blue (Hard Version) brute force, dp, math, number theory	2800	x616
2002F1	Court Blue (Easy Version) brute force, dfs and similar, dp, math, number theory	2600	x1034
2002E	Cosmic Rays brute force, data structures, dp	2300	x3056
2002D2	DFS Checker (Hard Version) binary search, data structures, dfs and similar, graphs, hashing, trees	2300	x2962
2002D1	DFS Checker (Easy Version) brute force, data structures, dfs and similar, graphs, hashing, trees	1900	x5216
2002C	Black Circles brute force, geometry, greedy, math	1200	x18089
2002B	Removals Game constructive algorithms, games	1000	x23588
2002A	Distanced Coloring constructive algorithms, implementation, math	800	x21517
2001E2	Deterministic Heap (Hard Version) combinatorics, dp, trees	2900	x310
2001E1	Deterministic Heap (Easy Version) combinatorics, dp, math, trees	2400	x1586
2001D	Longest Max Min Subsequence brute force, constructive algorithms, data structures, greedy, implementation	1900	x6712
2001C	Guess The Tree binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees	1500	x13202
2001B	Generate Permutation constructive algorithms	800	x26348
2001A	Make All Equal greedy, implementation	800	x33261
2000H	Ksyusha and the Loaded Set binary search, brute force, data structures, implementation	2200	x2401

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