Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
02:52:35
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Problems

#	Name
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8383
1954F	Unique Strings combinatorics, dp, math	3100	x242
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2169
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5918
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x75
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x267
1951G	Clacking Balls combinatorics, math, probabilities	3100	x328
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x751
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3548
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5315
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4221
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8929
1949K	Make Triangle constructive algorithms, math	2800	x302
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x369
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1725
1949H	Division Avoidance greedy, math	3100	x115
1949G	Scooter graphs, greedy	2300	x742
1949F	Dating greedy, sortings, trees	2200	x927
1949E	Damage per Second brute force, math	2900	x98
1949D	Funny or Scary? constructive algorithms	2600	x378
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1642
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x101
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x675
1948F	Rare Coins combinatorics, math, probabilities	2500	x1276
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2910
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9195
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x913
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2480
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4607
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x10605
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x631
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x733
1945F	Kirill and Mushrooms data structures, sortings	1900	x4107
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7920
1943F	Minimum Hamming Distance dp	3500	x105
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x289
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x426
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x722
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1426
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2041
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3757
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x90
1942G	Bessie and Cards combinatorics, dp, math	2800	x430
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x683
1942E	Farm Game combinatorics, games	2300	x1629
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2730
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6047
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3420
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5851
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9462
1938M	Zig-zag	3500	x57
1938L	XOR Operations	2800	x288
1938K	Tree Quiz	2400	x615
1938J	There and Back Again	2100	x1259
1938I	Symmetric Boundary	2800	x74
1938H	Pho Restaurant	1600	x2101
1938G	Personality Test	2300	x1035
1938F	Forming Groups	2400	x738
1938E	Duplicates	2200	x988
1938D	Bánh Bò	3300	x90
1938C	Bit Counting Sequence	1900	x1435
1938B	Attraction Score	3000	x188
1938A	Antiparticle Antiphysics	3500	x51
1936F	Grand Finale: Circles binary search, geometry	3300	x141
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x111
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x491
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1278
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2816
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7281
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x438
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1333
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8082
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8027
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x222
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1356
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3438
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6649
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x959
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2447
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x1047
1932F	Feed Cats data structures, dp, sortings	1900	x4015
1932E	Final Countdown implementation, math, number theory	1600	x7970
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2758
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7880
1930I	Counting Is Fun combinatorics	3500	x69
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x152
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x333
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x701
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1109
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2582
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x4046
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6938
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1766
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1655
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4673
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x237
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1680
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x4180
1928C	Physical Education Lesson brute force, math, number theory	1600	x8374
1927G	Paint Charges data structures, dp, greedy, math	2300	x1639