Problemset - Codeforces

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Codeforces Round 1006 (Div. 3)
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Problems

#	Name
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x7607
1982C	Boring Day binary search, data structures, dp, greedy, two pointers	1200	x18841
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x17735
1982A	Soccer greedy, implementation, math, sortings	800	x25894
1981F	Turtle and Paths on a Tree data structures, dp, trees	3000	x297
1981E	Turtle and Intersected Segments data structures, dsu, graphs, greedy	2600	x976
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1786
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x5613
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x14543
1981A	Turtle and Piggy Are Playing a Game brute force, greedy, math	800	x22956
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x1346
1980F2	Field Division (hard version) math, sortings	2400	x1065
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3918
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x11120
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x15089
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x19489
1980B	Choosing Cubes sortings, sortings	800	x35793
1980A	Problem Generator math	800	x42598
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x348
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1553
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6940
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x19736
1979B	XOR Sequences bitmasks, greedy	1000	x23654
1979A	Guess the Maximum brute force, greedy, implementation	800	x29798
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory, two pointers	2400	x1404
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x4034
1978D	Elections data structures, greedy, implementation, math	1600	x11962
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x15780
1978B	New Bakery binary search, greedy, math, ternary search	800	x23172
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x26562
1977E	Tensor constructive algorithms, graphs, interactive	2600	x736
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1989
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x7055
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x18290
1977A	Little Nikita math	800	x35159
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x648
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x1121
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x4866
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x10916
1976B	Increase/Decrease/Copy greedy, implementation	1100	x23058
1976A	Verify Password implementation, sortings, strings	800	x29721
1975I	Mind Bloom dp	3500	x126
1975H	378QAQ and Core greedy, strings	3500	x186
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x311
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x888
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x2463
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x6409
1975C	Chamo and Mocha's Array binary search, brute force, greedy	1200	x15439
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x18847
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x19330
1974G	Money Buys Less Happiness Now data structures, greedy, sortings	2000	x4621
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3742
1974E	Money Buys Happiness dp	1800	x8629
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x15644
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x16575
1974B	Symmetric Encoding implementation, sortings, strings	800	x31405
1974A	Phone Desktop greedy, math	800	x34395
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x256
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x860
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x2001
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x8816
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x14839
1973A	Chess For Three brute force, dp, implementation, math	900	x25793
1972B	Coin Games games	900	x22858
1972A	Contest Proposal brute force, greedy, two pointers	800	x23938
1971H	±1 2-sat, dfs and similar, graphs	2100	x2016
1971G	XOUR data structures, dsu, sortings	1700	x9831
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x10767
1971E	Find the Car binary search, math, sortings	1500	x15419
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x27312
1971C	Clock and Strings implementation	900	x35514
1971B	Different String implementation, strings	800	x39135
1971A	My First Sorting Problem implementation, sortings	800	x49402
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x390
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x659
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1464
1970F3	Playing Quidditch (Hard) implementation	2300	x381
1970F2	Playing Quidditch (Medium) implementation	2300	x366
1970F1	Playing Quidditch (Easy) implementation	2300	x448
1970E3	Trails (Hard) dp, matrices	2200	x834
1970E2	Trails (Medium) dp, matrices	2000	x1473
1970E1	Trails (Easy) dp	1800	x2521
1970D3	Arithmancy (Hard) interactive	3100	x122
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x234
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x715
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1754
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x3136
1970C1	Game on Tree (Easy) games	1400	x3877
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x533
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x893
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x1263
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x529
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x490
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x5546
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x312
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1523
1969D	Shop Game data structures, greedy, math, sortings	1900	x4913
1969C	Minimizing the Sum dp, implementation	1700	x9445
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x20104
1969A	Two Friends constructive algorithms, implementation, math	800	x20690