Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
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Problems

#	Name
1981C	Turtle and an Incomplete Sequence bitmasks, constructive algorithms, greedy, implementation, math, shortest paths		x2443
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers		x2400
1976C	Job Interview binary search, dp, greedy, implementation, two pointers		x7100
1976B	Increase/Decrease/Copy greedy, implementation		x16806
1976A	Verify Password implementation, sortings		x22253
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x1530
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x15042
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x2603
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x11332
1974B	Symmetric Encoding implementation, sortings, strings	800	x25613
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x135
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x6541
1973A	Chess For Three brute force, dp, implementation, math	900	x19986
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x7599
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x20966
1971C	Clock and Strings implementation	900	x26170
1971B	Different String implementation, strings	800	x29686
1971A	My First Sorting Problem implementation, sortings	800	x35797
1970F3	Playing Quidditch (Hard) implementation	2300	x280
1970F2	Playing Quidditch (Medium) implementation	2300	x272
1970F1	Playing Quidditch (Easy) implementation	2300	x341
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x2842
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x148
1969C	Minimizing the Sum dp, implementation	1700	x6711
1969A	Two Friends constructive algorithms, implementation, math	800	x17246
1967F	Next and Prev brute force, data structures, implementation	3200	x40
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x493
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x10089
1966B	Rectangle Filling constructive algorithms, implementation	1100	x12602
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x15788
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x711
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1278
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3377
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3700
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7473
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x18572
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x24641
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1879
1954B	Make It Ugly implementation, math	1200	x16239
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x706
1952H	Palindrome implementation, strings		x361
1952D	Are You a Procrastinator? implementation		x4234
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3122
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3643
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7885
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12442
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20883
1950C	Clock Conversion implementation, math	800	x35866
1950B	Upscaling implementation	800	x34259
1950A	Stair, Peak, or Neither? implementation	800	x45247
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x325
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2680
1948B	Array Fix brute force, dp, greedy, implementation	1100	x20893
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4168
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9419
1946A	Median of an Array greedy, implementation, sortings	800	x24108
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x646
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3407
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x585
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2492
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16915
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x177
1937B	Binary Path dp, greedy, implementation	1300	x13398
1937A	Shuffle Party implementation, math	800	x21774
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1129
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2504
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x404
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7461
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9930
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20874
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30352
1932E	Final Countdown implementation, math, number theory	1600	x7040
1932D	Card Game greedy, implementation	1400	x10167
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14033
1932A	Thorns and Coins dp, greedy, implementation	800	x27223
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2400
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x215
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x3878
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3052
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1529
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10363
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x23737
1926B	Vlad and Shapes geometry, implementation	800	x30220
1926A	Vlad and the Best of Five implementation	800	x42962
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2310
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x338
1923B	Monsters Attack! dp, greedy, implementation	1100	x16443
1923A	Moving Chips greedy, implementation	800	x23492
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5285
1922C	Closest Cities greedy, implementation, math	1300	x17095
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26049
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1143
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3503
1921B	Arranging Cats greedy, implementation	800	x32230
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5169
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x786
1918F	Caterpillar on a Tree dfs and similar, graphs, greedy, implementation, sortings, trees	2500	x793
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1596
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4341
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12774

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