Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
42:14:12
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Problems

#	Name
1958J	Necromancer *special problem	3200	x15
1958I	Equal Trees *special problem, graphs, meet-in-the-middle	3100	x22
1958H	Composite Spells *special problem, dp	2600	x64
1958G	Observation Towers *special problem	2400	x91
1958F	Narrow Paths *special problem, combinatorics	2000	x153
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x206
1958D	Staircase *special problem	1600	x364
1958C	Firewood *special problem	1500	x494
1958B	Clock in the Pool *special problem, math	1400	x672
1958A	1-3-5 *special problem, dp	1100	x1137
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x308
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x367
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1052
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3837
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8102
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x15803
1957A	Stickogon constructive algorithms, greedy	800	x20888
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x282
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x711
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1279
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3380
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11177
1956B	Nene and the Card Game games, greedy	800	x19500
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x19638
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1073
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3701
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6139
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7479
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x13320
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x18582
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x24660
1955A	Yogurt Sale math	800	x38002
1954F	Unique Strings combinatorics, dp, math	3100	x215
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1880
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5169
1954C	Long Multiplication greedy, math, number theory	1200	x16641
1954B	Make It Ugly implementation, math	1200	x16248
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x21305
1953A	Accuracy-Preserving Summation Algorithm *special problem
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x706
1952I	Dark Matter bitmasks, geometry		x380
1952H	Palindrome implementation, strings		x361
1952G	Mathematician Takeover binary search, dfs and similar, math		x950
1952F	Grid brute force		x1666
1952E	Sweep Line combinatorics, games, math		x214
1952D	Are You a Procrastinator? implementation		x4235
1952C	They Have Fooled brute force, schedules		x2754
1952B	Is it stated? strings		x10418
1952A	Are You a Robot, Again? strings		x11500
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x61
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x211
1951G	Clacking Balls combinatorics, math, probabilities	3100	x269
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x669
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3122
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x4831
1951C	Ticket Hoarding greedy, math, sortings	1400	x9981
1951B	Battle Cows binary search, data structures, greedy	1200	x12556
1951A	Dual Trigger constructive algorithms, greedy, math	900	x17062
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3649
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7889
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12449
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20887
1950C	Clock Conversion implementation, math	800	x35876
1950B	Upscaling implementation	800	x34267
1950A	Stair, Peak, or Neither? implementation	800	x45268
1949K	Make Triangle constructive algorithms, math	2800	x255
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x325
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1259
1949H	Division Avoidance greedy, math	3100	x78
1949G	Scooter graphs, greedy	2300	x663
1949F	Dating greedy, sortings, trees	2200	x798
1949E	Damage per Second brute force, math	2900	x89
1949D	Funny or Scary? constructive algorithms	2600	x314
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1314
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2125
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x89
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x629
1948F	Rare Coins combinatorics, math, probabilities	2500	x1173
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2681
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8394
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x14878
1948B	Array Fix brute force, dp, greedy, implementation	1100	x20898
1948A	Special Characters brute force, constructive algorithms	800	x26737
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x795
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2164
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4169
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9423
1946B	Maximum Sum dp, greedy, math	1100	x18414
1946A	Median of an Array greedy, implementation, sortings	800	x24120
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x510
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x646
1945F	Kirill and Mushrooms data structures, sortings	1900	x3682
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7166
1945D	Seraphim the Owl dp, greedy	1300	x12602
1945C	Left and Right Houses brute force	1200	x13276
1945B	Fireworks math, number theory	900	x20244
1945A	Setting up Camp greedy, math	800	x25298
1944B	Equal XOR bitmasks, constructive algorithms	1100	x14655
1944A	Destroying Bridges graphs, greedy, math	800	x21699
1943F	Minimum Hamming Distance dp	3500	x84