Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
2023B	Skipping binary search, dp, graphs, shortest paths	1700	x5494
2023A	Concatenation of Arrays constructive algorithms, greedy, math, sortings	1300	x13330
2022E2	Billetes MX (Hard Version) binary search, combinatorics, data structures, dsu, graphs	2600	x434
2022E1	Billetes MX (Easy Version) 2-sat, binary search, combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2500	x478
2022D2	Asesino (Hard Version) constructive algorithms, dp, interactive	2700	x594
2022D1	Asesino (Easy Version) binary search, brute force, constructive algorithms, implementation, interactive	1900	x3104
2022C	Gerrymandering dp, implementation	1800	x4347
2022B	Kar Salesman binary search, greedy, math	1300	x11188
2022A	Bus to Pénjamo constructive algorithms, greedy, implementation, math	800	x14813
2021E3	Digital Village (Extreme Version) data structures, dfs and similar, dp, dsu, graphs, greedy, math, trees	2800	x484
2021E2	Digital Village (Hard Version) data structures, dp, dsu, graphs, math, trees	2500	x900
2021E1	Digital Village (Easy Version) brute force, data structures, dfs and similar, dp, dsu, fft, graphs, greedy, implementation, math, trees	2300	x1573
2021D	Boss, Thirsty dp, greedy, implementation	2500	x756
2021C2	Adjust The Presentation (Hard Version) constructive algorithms, data structures, greedy, implementation, sortings	1900	x3774
2021C1	Adjust The Presentation (Easy Version) constructive algorithms, greedy	1300	x12115
2021B	Maximize Mex brute force, greedy, math, number theory	1200	x15561
2021A	Meaning Mean data structures, greedy, math, sortings	800	x19371
2020F	Count Leaves dp, math, number theory	2900	x209
2020E	Expected Power bitmasks, dp, math, probabilities	2000	x3180
2020D	Connect the Dots brute force, dp, dsu, graphs, math, trees	1800	x5978
2020C	Bitwise Balancing bitmasks, hashing, implementation, math, schedules, ternary search	1400	x15279
2020B	Brightness Begins binary search, math	1200	x17544
2020A	Find Minimum Operations bitmasks, brute force, greedy, math, number theory	800	x22804
2019B	All Pairs Segments implementation, math	1200	x14756
2019A	Max Plus Size brute force, dp, greedy	800	x23961
2018F3	Speedbreaker Counting (Hard Version) dp, greedy, math	3100	x196
2018F2	Speedbreaker Counting (Medium Version) dp, greedy, math	3000	x187
2018F1	Speedbreaker Counting (Easy Version) combinatorics, dp, greedy, math	2900	x226
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3400	x118
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x162
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices, sortings	2200	x1726
2018C	Tree Pruning brute force, dfs and similar, greedy, sortings, trees	1700	x6543
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers	1900	x4237
2018A	Cards Partition 2-sat, brute force, greedy, implementation, math	1600	x10730
2014H	Robin Hood Archery data structures, divide and conquer, greedy, hashing	1900	x3836
2014G	Milky Days brute force, data structures, greedy, implementation	2200	x1376
2014F	Sheriff's Defense dfs and similar, dp, greedy, trees	2000	x3839
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x5966
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x12850
2014C	Robin Hood in Town binary search, greedy, math	1100	x22805
2014B	Robin Hood and the Major Oak math	800	x29529
2014A	Robin Helps greedy, implementation	800	x39068
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x113
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x509
2013E	Prefix GCD brute force, dp, greedy, math, number theory	2200	x3426
2013D	Minimize the Difference binary search, greedy	1900	x6346
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x12229
2013B	Battle for Survive constructive algorithms, greedy, math	900	x24328
2013A	Zhan's Blender constructive algorithms, math	800	x28337
2011I	Stack and Queue *special problem, data structures, divide and conquer		x15
2011H	Strange Matrix *special problem, graphs, greedy		x47
2011G	Removal of a Permutation *special problem		x39
2011F	Good Subarray *special problem, data structures, greedy		x117
2011E	Rock-Paper-Scissors Bot *special problem, greedy, strings		x162
2011D	Among Wolves *special problem		x261
2011C	Split the Expression *special problem		x351
2011B	Shuffle *special problem		x630
2011A	Problem Solving *special problem		x1031
2010C2	Message Transmission Error (hard version) hashing, string suffix structures, strings, two pointers	1700	x3461
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x7491
2010B	Three Brothers brute force, implementation, math	800	x21023
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x17806
2009G3	Yunli's Subarray Queries (extreme version) data structures, dp, implementation	2700	x370
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1321
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x4049
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x7015
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x14327
2009D	Satyam and Counting geometry, math	1400	x15465
2009C	The Legend of Freya the Frog implementation, math	1100	x27888
2009B	osu!mania brute force, implementation	800	x44823
2009A	Minimize! brute force, math	800	x56086
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x3029
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x5475
2008F	Sakurako's Box combinatorics, math, number theory	1400	x13177
2008E	Alternating String brute force, data structures, dp, greedy, implementation, strings	1500	x10698
2008D	Sakurako's Hobby dp, dsu, graphs, math	1100	x20094
2008C	Longest Good Array binary search, brute force, math	800	x31732
2008B	Square or Not brute force, math, strings	800	x29709
2008A	Sakurako's Exam brute force, constructive algorithms, greedy, math	800	x36686
2007C	Dora and C++ math, number theory	1500	x13023
2007B	Index and Maximum Value data structures, greedy	900	x22227
2007A	Dora's Set greedy, math, number theory	800	x23379
2006F	Dora's Paint brute force, combinatorics, constructive algorithms, graphs, implementation	3500	x124
2006E	Iris's Full Binary Tree brute force, data structures, dfs and similar, trees	3100	x239
2006D	Iris and Adjacent Products data structures, greedy, implementation, math	2600	x732
2006C	Eri and Expanded Sets data structures, divide and conquer, math, number theory, two pointers	2300	x1749
2006B	Iris and the Tree brute force, data structures, dfs and similar, dsu, math, trees	1800	x3536
2006A	Iris and Game on the Tree constructive algorithms, dfs and similar, games, graphs, greedy, trees	1700	x7096
2005E2	Subtangle Game (Hard Version) data structures, dp, games, greedy, implementation	2500	x848
2005E1	Subtangle Game (Easy Version) dp, games, greedy, implementation	2100	x2849
2005D	Alter the GCD binary search, brute force, data structures, divide and conquer, implementation, number theory	2400	x931
2005C	Lazy Narek dp, implementation, strings	1800	x7354
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x18292
2005B1	The Strict Teacher (Easy Version) greedy, math, sortings	1000	x21348
2005A	Simple Palindrome combinatorics, constructive algorithms, greedy, math	900	x22738
2004G	Substring Compression data structures, dp, matrices	3200	x335
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x1230
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x4223
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x11199
2004C	Splitting Items games, greedy, sortings	1100	x24148