Problemset - Codeforces

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Problems

#	Name
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1681
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5994
1958J	Necromancer *special problem	3200	x24
1958I	Equal Trees *special problem, graphs, meet-in-the-middle	3100	x27
1958H	Composite Spells *special problem, dp	2600	x70
1958G	Observation Towers *special problem	2400	x99
1958F	Narrow Paths *special problem, combinatorics	2000	x169
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x222
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x357
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x412
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1135
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4111
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x311
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x765
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1352
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3575
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1156
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4055
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6516
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7938
1954F	Unique Strings combinatorics, dp, math	3100	x234
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2020
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5535
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x70
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x234
1951G	Clacking Balls combinatorics, math, probabilities	3100	x305
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x718
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3336
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5107
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3962
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8412
1949K	Make Triangle constructive algorithms, math	2800	x274
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x356
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1469
1949H	Division Avoidance greedy, math	3100	x78
1949G	Scooter graphs, greedy	2300	x689
1949F	Dating greedy, sortings, trees	2200	x851
1949E	Damage per Second brute force, math	2900	x92
1949D	Funny or Scary? constructive algorithms	2600	x335
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1463
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x97
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x658
1948F	Rare Coins combinatorics, math, probabilities	2500	x1222
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2805
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8753
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x844
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2271
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4372
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x570
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x689
1945F	Kirill and Mushrooms data structures, sortings	1900	x3895
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7556
1943F	Minimum Hamming Distance dp	3500	x94
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x273
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x405
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x658
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1349
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1939
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3574
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x78
1942G	Bessie and Cards combinatorics, dp, math	2800	x413
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x631
1942E	Farm Game combinatorics, games	2300	x1567
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2629
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5844
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3249
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5561
1938M	Zig-zag	3500	x48
1938L	XOR Operations	2800	x259
1938K	Tree Quiz	2400	x553
1938J	There and Back Again	2100	x1151
1938I	Symmetric Boundary	2800	x56
1938G	Personality Test	2300	x909
1938F	Forming Groups	2400	x672
1938E	Duplicates	2200	x891
1938D	Bánh Bò	3300	x82
1938C	Bit Counting Sequence	1900	x1321
1938B	Attraction Score	3000	x172
1938A	Antiparticle Antiphysics	3500	x45
1936F	Grand Finale: Circles binary search, geometry	3300	x74
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x103
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x459
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1178
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2619
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6951
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x421
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1248
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7737
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7610
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x204
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1270
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3257
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6369
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x918
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2335
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x952
1932F	Feed Cats data structures, dp, sortings	1900	x3737
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2599
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7445
1930I	Counting Is Fun combinatorics	3500	x60