Problemset - Codeforces

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

#	Name
1958D	Staircase *special problem	1600	x534
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x445
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x503
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1283
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4557
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9754
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x366
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x890
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1470
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3959
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12999
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1269
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4590
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7173
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8709
1954F	Unique Strings combinatorics, dp, math	3100	x256
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2334
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6257
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x76
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x284
1951G	Clacking Balls combinatorics, math, probabilities	3100	x337
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x769
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3672
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5450
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4444
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9257
1949K	Make Triangle constructive algorithms, math	2800	x332
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x404
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1893
1949H	Division Avoidance greedy, math	3100	x127
1949G	Scooter graphs, greedy	2300	x797
1949F	Dating greedy, sortings, trees	2200	x1009
1949E	Damage per Second brute force, math	2900	x105
1949D	Funny or Scary? constructive algorithms	2600	x418
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1802
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x115
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x702
1948F	Rare Coins combinatorics, math, probabilities	2500	x1341
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x3027
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9546
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x994
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2588
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4780
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11067
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x686
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x751
1945F	Kirill and Mushrooms data structures, sortings	1900	x4272
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8280
1943F	Minimum Hamming Distance dp	3500	x113
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x306
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x443
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x812
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1519
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2137
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3899
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	x2830
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6215
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
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
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	x2994
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7542
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	x1397
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
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	x6876
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
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
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2893
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x8187
1930I	Counting Is Fun combinatorics	3500	x74
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x181