Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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Problems

#	Name
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1519
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2136
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3899
1943A	MEX Game 1 games, greedy	1300	x18140
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x96
1942G	Bessie and Cards combinatorics, dp, math	2800	x456
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x702
1942E	Farm Game combinatorics, games	2300	x1700
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2829
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6215
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x11075
1942B	Bessie and MEX constructive algorithms, math	1100	x14096
1942A	Farmer John's Challenge constructive algorithms, math	800	x17364
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3594
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x6116
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9826
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x18516
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x33665
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x30109
1941A	Rudolf and the Ticket brute force, math	800	x42763
1938M	Zig-zag	3500	x61
1938L	XOR Operations	2800	x296
1938K	Tree Quiz	2400	x637
1938J	There and Back Again	2100	x1305
1938I	Symmetric Boundary	2800	x77
1938H	Pho Restaurant	1600	x2180
1938G	Personality Test	2300	x1066
1938F	Forming Groups	2400	x766
1938E	Duplicates	2200	x1021
1938D	Bánh Bò	3300	x91
1938C	Bit Counting Sequence	1900	x1486
1938B	Attraction Score	3000	x201
1938A	Antiparticle Antiphysics	3500	x56
1937B	Binary Path dp, greedy, implementation	1300	x15184
1937A	Shuffle Party implementation, math	800	x23282
1936F	Grand Finale: Circles binary search, geometry	3300	x145
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x125
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x519
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1345
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2993
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7541
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x454
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1396
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8333
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8274
1935B	Informatics in MAC constructive algorithms	1200	x18715
1935A	Entertainment in MAC constructive algorithms, strings	800	x28166
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x241
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1409
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3567
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6875
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x19146
1934A	Too Min Too Max greedy, math	800	x25567
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x987
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2517
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x11371
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x20485
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x22803
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x33101
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x38409
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x1098
1932F	Feed Cats data structures, dp, sortings	1900	x4213
1932E	Final Countdown implementation, math, number theory	1600	x8337
1932D	Card Game greedy, implementation	1400	x11605
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x15952
1932B	Chaya Calendar number theory	1100	x20995
1932A	Thorns and Coins dp, greedy, implementation	800	x29958
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2893
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x8187
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x16234
1931D	Divisible Pairs combinatorics, math, number theory	1300	x19335
1931C	Make Equal Again brute force, greedy, math	1000	x29458
1931B	Make Equal greedy	800	x32480
1931A	Recovering a Small String brute force, strings	800	x36502
1930I	Counting Is Fun combinatorics	3500	x74
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x181
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x347
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x728
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1159
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2666
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x4170
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x7180
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x15490
1930A	Maximise The Score greedy, sortings	800	x18740
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1821
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1725
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4869
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x15121
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x25447
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x31794
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x244
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1745
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x4344
1928C	Physical Education Lesson brute force, math, number theory	1600	x8696
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x17739
1928A	Rectangle Cutting geometry, math	800	x22845
1927G	Paint Charges data structures, dp, greedy, math	2300	x1715
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4471
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x14228
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x21941