Problemset - Codeforces

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Educational Codeforces Round 170 (Rated for Div. 2)
13 days

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Difficulty: —

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Problems

#	Name
2020F	Count Leaves dp, math, number theory		x82
2020E	Expected Power bitmasks, brute force, dp, math, probabilities		x1808
2020D	Connect the Dots brute force, dp, dsu, graphs, math, trees		x3374
2020C	Bitwise Balancing bitmasks, implementation, math		x8105
2020B	Brightness Begins binary search, math		x11450
2020A	Find Minimum Operations bitmasks, brute force, greedy, math		x16130
2019B	All Pairs Segments implementation, math		x10692
2019A	Max Plus Size brute force, dp, greedy		x17597
2018F3	Speedbreaker Counting (Hard Version) dp, greedy, math		x111
2018F2	Speedbreaker Counting (Medium Version) dp, greedy, math		x114
2018F1	Speedbreaker Counting (Easy Version) combinatorics, dp, greedy, math		x145
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings		x52
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings		x82
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices		x1121
2018C	Tree Pruning brute force, data structures, dfs and similar, greedy, sortings, trees		x4374
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers		x2650
2018A	Cards Partition brute force, greedy, implementation, math		x7571
2014H	Robin Hood Archery data structures, divide and conquer, greedy, hashing	1900	x2714
2014G	Milky Days brute force, data structures, greedy, implementation	2200	x925
2014F	Sheriff's Defense dfs and similar, dp, greedy, trees	2000	x2698
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x4360
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x9709
2014C	Robin Hood in Town binary search, greedy, math	1100	x17736
2014B	Robin Hood and the Major Oak math	800	x23811
2014A	Robin Helps greedy, implementation	800	x30538
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x64
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x372
2013E	Prefix GCD brute force, dp, greedy, math, number theory	2200	x2516
2013D	Minimize the Difference binary search, greedy	1900	x4960
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x10044
2013B	Battle for Survive constructive algorithms, greedy, math	900	x19588
2013A	Zhan's Blender constructive algorithms, math	800	x23706
2011I	Stack and Queue *special problem, data structures, divide and conquer		x2
2011H	Strange Matrix *special problem, graphs, greedy		x29
2011G	Removal of a Permutation *special problem		x19
2011F	Good Subarray *special problem, data structures, greedy		x87
2011E	Rock-Paper-Scissors Bot *special problem, greedy, strings		x128
2011D	Among Wolves *special problem		x219
2011C	Split the Expression *special problem		x289
2011B	Shuffle *special problem		x539
2011A	Problem Solving *special problem		x884
2010C2	Message Transmission Error (hard version) hashing, string suffix structures, strings, two pointers	1700	x2627
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x6097
2010B	Three Brothers brute force, implementation, math	800	x17050
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x14334
2009G3	Yunli's Subarray Queries (extreme version) data structures, dp, implementation	2700	x270
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1037
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x3389
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x5802
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x11753
2009D	Satyam and Counting geometry, math	1400	x12843
2009C	The Legend of Freya the Frog implementation, math	1100	x23206
2009B	osu!mania brute force, implementation	800	x37759
2009A	Minimize! brute force, math	800	x45151
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x2566
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x4600
2008F	Sakurako's Box combinatorics, math, number theory	1400	x11499
2008E	Alternating String brute force, data structures, dp, greedy, implementation, strings	1500	x8841
2008D	Sakurako's Hobby dp, dsu, graphs, math	1100	x17858
2008C	Longest Good Array binary search, brute force, math	800	x28009
2008B	Square or Not brute force, math, strings	800	x26670
2008A	Sakurako's Exam brute force, constructive algorithms, greedy, math	800	x32406
2007C	Dora and C++ math, number theory	1500	x11098
2007B	Index and Maximum Value data structures, greedy	900	x19568
2007A	Dora's Set greedy, math, number theory	800	x21379
2006F	Dora's Paint brute force, combinatorics, constructive algorithms, graphs, implementation	3500	x92
2006E	Iris's Full Binary Tree brute force, data structures, dfs and similar, trees	3100	x200
2006D	Iris and Adjacent Products data structures, greedy, implementation, math	2600	x597
2006C	Eri and Expanded Sets data structures, divide and conquer, math, number theory, two pointers	2300	x1465
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x2930
2006A	Iris and Game on the Tree constructive algorithms, dfs and similar, games, graphs, greedy, trees	1700	x6106
2005E2	Subtangle Game (Hard Version) data structures, dp, games, greedy, implementation	2500	x664
2005E1	Subtangle Game (Easy Version) dp, games, greedy, implementation	2100	x2341
2005D	Alter the GCD binary search, brute force, data structures, divide and conquer, implementation, number theory	2400	x715
2005C	Lazy Narek dp, implementation, strings	1800	x6297
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x15345
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings	1000	x17514
2005A	Simple Palindrome combinatorics, constructive algorithms, greedy, math	900	x19664
2004G	Substring Compression data structures, dp, matrices	3200	x275
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x1061
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x3804
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x10038
2004C	Splitting Items games, greedy, sortings	1100	x22190
2004B	Game with Doors brute force, greedy	1000	x24479
2004A	Closest Point implementation, math	800	x28945
2003F	Turtle and Three Sequences brute force, data structures, dp, greedy, math, probabilities, two pointers	2800	x366
2003E2	Turtle and Inversions (Hard Version) brute force, data structures, divide and conquer, dp, greedy, math, two pointers	2700	x477
2003E1	Turtle and Inversions (Easy Version) brute force, divide and conquer, dp, greedy, math	2600	x674
2003D2	Turtle and a MEX Problem (Hard Version) dfs and similar, dp, graphs, greedy, implementation, math	2100	x3747
2003D1	Turtle and a MEX Problem (Easy Version) greedy, math	1500	x10472
2003C	Turtle and Good Pairs constructive algorithms, greedy, sortings, strings	1200	x17148
2003B	Turtle and Piggy Are Playing a Game 2 games, greedy, sortings	800	x24046
2003A	Turtle and Good Strings greedy, strings	800	x27647
2002H	Counting 101 greedy	3500	x66
2002G	Lattice Optimizing bitmasks, brute force, hashing, meet-in-the-middle	3400	x205
2002F2	Court Blue (Hard Version) brute force, dp, math, number theory	2800	x402
2002F1	Court Blue (Easy Version) brute force, dfs and similar, dp, math, number theory	2600	x782
2002E	Cosmic Rays brute force, data structures, dp	2300	x2308
2002D2	DFS Checker (Hard Version) binary search, data structures, dfs and similar, graphs, hashing, trees	2300	x2240
2002D1	DFS Checker (Easy Version) brute force, data structures, dfs and similar, graphs, hashing, trees	1900	x4139

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