Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
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Problems

#	Name
2028D	Alice's Adventures in Cards constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search	2000	x2331
2028C	Alice's Adventures in Cutting Cake binary search, dp, greedy, two pointers	1600	x5887
2028B	Alice's Adventures in Permuting binary search, implementation, math	1400	x8479
2028A	Alice's Adventures in ''Chess'' brute force, implementation, math	900	x13768
2027E2	Bit Game (Hard Version) bitmasks, dp, math	3100	x49
2027E1	Bit Game (Easy Version) bitmasks, brute force, games, math	2800	x128
2027D2	The Endspeaker (Hard Version) binary search, data structures, dp, greedy, implementation, two pointers	2200	x1303
2027D1	The Endspeaker (Easy Version) binary search, dp, graphs, greedy, implementation, two pointers	1700	x4694
2027C	Add Zeros brute force, data structures, dfs and similar, dp, graphs, greedy	1500	x8858
2027B	Stalin Sort brute force, greedy	1100	x13574
2027A	Rectangle Arrangement geometry, implementation, math	800	x18505
2026F	Bermart Ice Cream data structures, dfs and similar, divide and conquer, dp, implementation, trees	2700	x172
2026E	Best Subsequence bitmasks, dfs and similar, flows, graph matchings, graphs	2500	x1103
2026D	Sums of Segments binary search, data structures, dp, implementation, math	1900	x3967
2026C	Action Figures binary search, brute force, constructive algorithms, data structures, greedy, implementation	1500	x8595
2026B	Black Cells binary search, brute force, constructive algorithms, greedy	1300	x11716
2026A	Perpendicular Segments constructive algorithms, geometry, greedy, math	900	x15889
2025G	Variable Damage data structures, flows	3000	x136
2025F	Choose Your Queries constructive algorithms, dfs and similar, dp, graphs, greedy, trees	2700	x687
2025E	Card Game combinatorics, dp, fft, greedy, math	2200	x1752
2025D	Attribute Checks brute force, data structures, dp, implementation, math, two pointers	1800	x5892
2025C	New Game binary search, brute force, greedy, implementation, sortings, two pointers	1300	x14458
2025B	Binomial Coefficients, Kind Of combinatorics, dp, math	1100	x16408
2025A	Two Screens binary search, greedy, strings, two pointers	800	x23439
2024B	Buying Lemonade binary search, constructive algorithms, sortings	1100	x13100
2024A	Profitable Interest Rate greedy, math	800	x18801
2023F	Hills and Pits data structures, greedy, math, matrices	3500	x59
2023E	Tree of Life dp, greedy, trees	3300	x88
2023D	Many Games brute force, dp, greedy, math, probabilities	2900	x404
2023C	C+K+S constructive algorithms, dfs and similar, graphs, greedy, hashing, implementation, strings	2400	x951
2023B	Skipping binary search, dp, graphs, shortest paths	1700	x4891
2023A	Concatenation of Arrays constructive algorithms, greedy, math, sortings	1300	x11957
2022E2	Billetes MX (Hard Version) binary search, combinatorics, data structures, dsu, graphs	2600	x378
2022E1	Billetes MX (Easy Version) 2-sat, binary search, combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2500	x417
2022D2	Asesino (Hard Version) constructive algorithms, dp, interactive	2700	x510
2022D1	Asesino (Easy Version) binary search, brute force, constructive algorithms, implementation, interactive	1900	x2814
2022C	Gerrymandering dp, implementation	1800	x3873
2022B	Kar Salesman binary search, greedy, math	1300	x9925
2022A	Bus to Pénjamo constructive algorithms, greedy, implementation, math	800	x13727
2021E3	Digital Village (Extreme Version) data structures, dfs and similar, dp, dsu, graphs, greedy, math, trees	2800	x429
2021E2	Digital Village (Hard Version) data structures, dp, dsu, graphs, math, trees	2500	x821
2021E1	Digital Village (Easy Version) brute force, data structures, dfs and similar, dp, dsu, fft, graphs, greedy, implementation, math, trees	2300	x1480
2021D	Boss, Thirsty dp, greedy, implementation	2500	x676
2021C2	Adjust The Presentation (Hard Version) constructive algorithms, data structures, greedy, implementation, sortings	1900	x3561
2021C1	Adjust The Presentation (Easy Version) constructive algorithms, greedy	1300	x11396
2021B	Maximize Mex brute force, greedy, math, number theory	1200	x14290
2021A	Meaning Mean data structures, greedy, math, sortings	800	x18559
2020F	Count Leaves dp, math, number theory	2900	x195
2020E	Expected Power bitmasks, dp, math, probabilities	2000	x2996
2020D	Connect the Dots brute force, dp, dsu, graphs, math, trees	1800	x5668
2020C	Bitwise Balancing bitmasks, hashing, implementation, math, schedules, ternary search	1400	x14398
2020B	Brightness Begins binary search, math	1200	x16368
2020A	Find Minimum Operations bitmasks, brute force, greedy, math, number theory	800	x21856
2019B	All Pairs Segments implementation, math	1200	x13830
2019A	Max Plus Size brute force, dp, greedy	800	x22824
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	x111
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x148
2018D	Max Plus Min Plus Size data structures, dp, dsu, greedy, implementation, matrices, sortings	2200	x1595
2018C	Tree Pruning brute force, dfs and similar, greedy, sortings, trees	1700	x6157
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers	1900	x3958
2018A	Cards Partition 2-sat, brute force, greedy, implementation, math	1600	x10136
2014H	Robin Hood Archery data structures, divide and conquer, greedy, hashing	1900	x3507
2014G	Milky Days brute force, data structures, greedy, implementation	2200	x1279
2014F	Sheriff's Defense dfs and similar, dp, greedy, trees	2000	x3562
2014E	Rendez-vous de Marian et Robin dfs and similar, graphs, shortest paths	1800	x5599
2014D	Robert Hood and Mrs Hood brute force, data structures, greedy, sortings	1400	x12079
2014C	Robin Hood in Town binary search, greedy, math	1100	x21542
2014B	Robin Hood and the Major Oak math	800	x28242
2014A	Robin Helps greedy, implementation	800	x37001
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x103
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x473
2013E	Prefix GCD brute force, dp, greedy, math, number theory	2200	x3198
2013D	Minimize the Difference binary search, greedy	1900	x6024
2013C	Password Cracking constructive algorithms, interactive, strings	1400	x11619
2013B	Battle for Survive constructive algorithms, greedy, math	900	x22952
2013A	Zhan's Blender constructive algorithms, math	800	x27095
2011I	Stack and Queue *special problem, data structures, divide and conquer		x14
2011H	Strange Matrix *special problem, graphs, greedy		x45
2011G	Removal of a Permutation *special problem		x38
2011F	Good Subarray *special problem, data structures, greedy		x115
2011E	Rock-Paper-Scissors Bot *special problem, greedy, strings		x160
2011D	Among Wolves *special problem		x258
2011C	Split the Expression *special problem		x344
2011B	Shuffle *special problem		x621
2011A	Problem Solving *special problem		x1011
2010C2	Message Transmission Error (hard version) hashing, string suffix structures, strings, two pointers	1700	x3122
2010C1	Message Transmission Error (easy version) brute force, strings	1400	x6991
2010B	Three Brothers brute force, implementation, math	800	x19870
2010A	Alternating Sum of Numbers brute force, implementation, math	800	x16795
2009G3	Yunli's Subarray Queries (extreme version) data structures, dp, implementation	2700	x332
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1208
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x3782
2009F	Firefly's Queries bitmasks, data structures, flows, math	1700	x6525
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x13256
2009D	Satyam and Counting geometry, math	1400	x14341
2009C	The Legend of Freya the Frog implementation, math	1100	x25903
2009B	osu!mania brute force, implementation	800	x41825