Problemset - Codeforces

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Codeforces Round (Div. 2)
29:17:04
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Problems

#	Name
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1688
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6037
1965A	Everything Nim games, greedy, math, sortings	1400	x12327
1958J	Necromancer *special problem	3200	x26
1958I	Equal Trees *special problem, graphs, meet-in-the-middle	3100	x29
1958H	Composite Spells *special problem, dp	2600	x71
1958G	Observation Towers *special problem	2400	x100
1958F	Narrow Paths *special problem, combinatorics	2000	x170
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x226
1958D	Staircase *special problem	1600	x436
1958C	Firewood *special problem	1500	x600
1958B	Clock in the Pool *special problem, math	1400	x770
1958A	1-3-5 *special problem, dp	1100	x1454
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x362
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x416
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1138
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4134
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8816
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16899
1957A	Stickogon constructive algorithms, greedy	800	x22092
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x312
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x771
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1359
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3596
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12025
1956B	Nene and the Card Game games, greedy	800	x20425
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x20640
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1159
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4088
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6554
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7975
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x14262
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x19789
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x26151
1955A	Yogurt Sale math	800	x40277
1954F	Unique Strings combinatorics, dp, math	3100	x237
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2026
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5557
1954C	Long Multiplication greedy, math, number theory	1200	x18019
1954B	Make It Ugly implementation, math	1200	x17310
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x22589
1953A	Accuracy-Preserving Summation Algorithm *special problem
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x734
1952I	Dark Matter bitmasks, geometry		x411
1952H	Palindrome implementation, strings		x394
1952G	Mathematician Takeover binary search, dfs and similar, math		x985
1952F	Grid brute force		x1698
1952E	Sweep Line combinatorics, games, math		x227
1952D	Are You a Procrastinator? implementation		x4397
1952C	They Have Fooled brute force, schedules		x2817
1952B	Is it stated? strings		x10638
1952A	Are You a Robot, Again? strings		x11811
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	x719
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3350
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5121
1951C	Ticket Hoarding greedy, math, sortings	1400	x10818
1951B	Battle Cows binary search, data structures, greedy	1200	x13643
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18512
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3976
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8444
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13343
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21942
1950C	Clock Conversion implementation, math	800	x37524
1950B	Upscaling implementation	800	x35876
1950A	Stair, Peak, or Neither? implementation	800	x48006
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	x1483
1949H	Division Avoidance greedy, math	3100	x78
1949G	Scooter graphs, greedy	2300	x690
1949F	Dating greedy, sortings, trees	2200	x853
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	x1479
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2614
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x98
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x661
1948F	Rare Coins combinatorics, math, probabilities	2500	x1228
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2818
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8787
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15695
1948B	Array Fix brute force, dp, greedy, implementation	1100	x21816
1948A	Special Characters brute force, constructive algorithms	800	x27551
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x847
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2279
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4383
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9982
1946B	Maximum Sum dp, greedy, math	1100	x19340
1946A	Median of an Array greedy, implementation, sortings	800	x25109
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x576
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x692
1945F	Kirill and Mushrooms data structures, sortings	1900	x3905
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7587
1945D	Seraphim the Owl dp, greedy	1300	x13460
1945C	Left and Right Houses brute force	1200	x14035
1945B	Fireworks math, number theory	900	x21397
1945A	Setting up Camp greedy, math	800	x26419