Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1989A	Catch the Coin implementation	800	x18538
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x11058
1985H2	Maximize the Largest Component (Hard Version) data structures, dfs and similar, dp, dsu, implementation	2200	x1092
1985H1	Maximize the Largest Component (Easy Version) brute force, data structures, dfs and similar, dsu, graphs, implementation	1700	x4084
1985D	Manhattan Circle implementation, math	900	x28539
1985A	Creating Words implementation, strings	800	x41394
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x160
1984D	''a'' String Problem brute force, hashing, implementation, math, string suffix structures, strings	2000	x2629
1984B	Large Addition implementation, math	1100	x15352
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x5036
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x12995
1982A	Soccer greedy, implementation, math, sortings	800	x20203
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4182
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8597
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x11978
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1098
1979A	Guess the Maximum brute force, greedy, implementation	800	x25915
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x2774
1978D	Elections data structures, greedy, implementation, math	1600	x8560
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x11766
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x3403
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x8637
1976B	Increase/Decrease/Copy greedy, implementation	1100	x19491
1976A	Verify Password implementation, sortings, strings	800	x25159
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x1885
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x17006
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3055
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x12830
1974B	Symmetric Encoding implementation, sortings, strings	800	x27778
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x175
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7227
1973A	Chess For Three brute force, dp, implementation, math	900	x21708
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x8526
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x22892
1971C	Clock and Strings implementation	900	x28664
1971B	Different String implementation, strings	800	x32472
1971A	My First Sorting Problem implementation, sortings	800	x39259
1970F3	Playing Quidditch (Hard) implementation	2300	x301
1970F2	Playing Quidditch (Medium) implementation	2300	x292
1970F1	Playing Quidditch (Easy) implementation	2300	x363
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x3441
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x193
1969C	Minimizing the Sum dp, implementation	1700	x7308
1969A	Two Friends constructive algorithms, implementation, math	800	x18316
1967F	Next and Prev brute force, data structures, implementation	3200	x49
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x533
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x10880
1966B	Rectangle Filling constructive algorithms, implementation	1100	x13450
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x16489
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x740
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1327
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3513
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3911
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7793
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x19343
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x25584
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1974
1954B	Make It Ugly implementation, math	1200	x16946
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x722
1952H	Palindrome implementation, strings		x382
1952D	Are You a Procrastinator? implementation		x4326
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3266
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3848
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8264
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13050
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21547
1950C	Clock Conversion implementation, math	800	x36987
1950B	Upscaling implementation	800	x35317
1950A	Stair, Peak, or Neither? implementation	800	x47008
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x346
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2750
1948B	Array Fix brute force, dp, greedy, implementation	1100	x21457
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4281
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9734
1946A	Median of an Array greedy, implementation, sortings	800	x24745
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x675
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3515
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x615
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2572
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x17334
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x181
1937B	Binary Path dp, greedy, implementation	1300	x13841
1937A	Shuffle Party implementation, math	800	x22189
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1159
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2573
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x412
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7645
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10292
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21389
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30989
1932E	Final Countdown implementation, math, number theory	1600	x7374
1932D	Card Game greedy, implementation	1400	x10534
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14558
1932A	Thorns and Coins dp, greedy, implementation	800	x27879
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2456
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x222
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4002
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3217
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1569
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10824

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