Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16948
1979B	XOR Sequences bitmasks, greedy	1000	x20829
1979A	Guess the Maximum brute force, greedy, implementation	800	x27142
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory, two pointers	2400	x1119
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x3211
1978D	Elections data structures, greedy, implementation, math	1600	x9663
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x13101
1978B	New Bakery binary search, greedy, math, ternary search	800	x20353
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x23267
1977E	Tensor constructive algorithms, graphs, interactive	2600	x571
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1609
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5985
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16370
1977A	Little Nikita math	800	x28497
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x471
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x872
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x3653
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x9190
1976B	Increase/Decrease/Copy greedy, implementation	1100	x20451
1976A	Verify Password implementation, sortings, strings	800	x26190
1975I	Mind Bloom dp	3500	x66
1975H	378QAQ and Core greedy, strings	3500	x88
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x200
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x718
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x1998
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x5286
1975C	Chamo and Mocha's Array binary search, brute force, greedy	1200	x13146
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x16228
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x17568
1974G	Money Buys Less Happiness Now data structures, greedy, sortings	2000	x3763
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3200
1974E	Money Buys Happiness dp	1800	x7010
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13402
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x14382
1974B	Symmetric Encoding implementation, sortings, strings	800	x28511
1974A	Phone Desktop greedy, math	800	x31193
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x181
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x712
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x1731
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7543
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12818
1973A	Chess For Three brute force, dp, implementation, math	900	x22536
1972B	Coin Games games	900	x19707
1972A	Contest Proposal brute force, greedy, two pointers	800	x21548
1971H	±1 2-sat, dfs and similar, graphs	2100	x1519
1971G	XOUR data structures, dsu, sortings	1700	x8251
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x8860
1971E	Find the Car binary search, math, sortings	1500	x12643
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x23657
1971C	Clock and Strings implementation	900	x29631
1971B	Different String implementation, strings	800	x33398
1971A	My First Sorting Problem implementation, sortings	800	x40470
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x273
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x473
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1109
1970F3	Playing Quidditch (Hard) implementation	2300	x313
1970F2	Playing Quidditch (Medium) implementation	2300	x307
1970F1	Playing Quidditch (Easy) implementation	2300	x381
1970E3	Trails (Hard) dp, matrices	2200	x560
1970E2	Trails (Medium) dp, matrices	2000	x988
1970E1	Trails (Easy) dp	1800	x1654
1970D3	Arithmancy (Hard) interactive	3100	x89
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x168
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x510
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1221
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2098
1970C1	Game on Tree (Easy) games	1400	x2747
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x398
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x651
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x923
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x398
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x388
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x3746
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x214
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1193
1969D	Shop Game data structures, greedy, math, sortings	1900	x4062
1969C	Minimizing the Sum dp, implementation	1700	x7671
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x17345
1969A	Two Friends constructive algorithms, implementation, math	800	x18738
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1727
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3830
1968F	Equal XOR Segments binary search, data structures	1800	x4896
1968E	Cells Arrangement constructive algorithms	1600	x9450
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x13731
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x23034
1968B	Prefiquence greedy, two pointers	800	x26300
1968A	Maximize? brute force, math, number theory	800	x31393
1967F	Next and Prev brute force, data structures, implementation	3200	x52
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x85
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x172
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x559
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1515
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3583
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x12059
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x11290
1966B	Rectangle Filling constructive algorithms, implementation	1100	x13897
1966A	Card Exchange constructive algorithms, games, greedy	800	x16783
1965F	Conference data structures, flows	3300	x133
1965E	Connected Cubes constructive algorithms, games	3100	x217
1965D	Missing Subarray Sum constructive algorithms	2900	x336