Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1992F	Valuable Cards dp, greedy, number theory, two pointers	1900	x2807
1992D	Test of Love dp, greedy, implementation	1200	x13585
1989E	Distance to Different combinatorics, dp, math	2300	x1371
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x4485
1987G2	Spinning Round (Hard Version) divide and conquer, dp, trees	3500	x69
1987G1	Spinning Round (Easy Version) divide and conquer, dp, trees	2900	x175
1987F2	Interesting Problem (Hard Version) dp	2600	x727
1987F1	Interesting Problem (Easy Version) dp	2500	x833
1987D	World is Mine dp, games	1800	x5498
1987C	Basil's Garden dp, greedy	1200	x13925
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x12677
1985H2	Maximize the Largest Component (Hard Version) data structures, dfs and similar, dp, dsu, implementation	2200	x1200
1984H	Tower Capturing combinatorics, dp, geometry	3300	x136
1984F	Reconstruction brute force, dp, math	2500	x774
1984E	Shuffle dp, greedy, trees	2400	x1176
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x6304
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x14063
1983G	Your Loss bitmasks, brute force, dp, trees	3000	x126
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1246
1982C	Boring Day binary search, data structures, dp, greedy, two pointers	1200	x14456
1981F	Turtle and Paths on a Tree data structures, dp, trees	3000	x200
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5686
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x3066
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5876
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x442
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x8944
1975I	Mind Bloom dp	3500	x61
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x695
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x5163
1974E	Money Buys Happiness dp	1800	x6856
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x179
1973A	Chess For Three brute force, dp, implementation, math	900	x22222
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x23389
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x262
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x460
1970E3	Trails (Hard) dp, matrices	2200	x544
1970E2	Trails (Medium) dp, matrices	2000	x951
1970E1	Trails (Easy) dp	1800	x1591
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1177
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2010
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x207
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1172
1969C	Minimizing the Sum dp, implementation	1700	x7556
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1711
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3784
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x83
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x168
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1495
1958H	Composite Spells *special problem, dp	2600	x68
1958A	1-3-5 *special problem, dp	1100	x1402
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1119
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4088
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8704
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3560
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1147
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4023
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6490
1954F	Unique Strings combinatorics, dp, math	3100	x234
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5506
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x233
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3930
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21788
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1445
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x96
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x15559
1948B	Array Fix brute force, dp, greedy, implementation	1100	x21682
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x838
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2257
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9877
1946B	Maximum Sum dp, greedy, math	1100	x19205
1945D	Seraphim the Owl dp, greedy	1300	x13331
1943F	Minimum Hamming Distance dp	3500	x93
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x656
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1345
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x77
1942G	Bessie and Cards combinatorics, dp, math	2800	x412
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2615
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8828
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x17506
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x31515
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x28035
1939D	Big Persimmon *special problem, dp, games		x84
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x20
1937B	Binary Path dp, greedy, implementation	1300	x14005
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7585
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x17723
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2327
1932F	Feed Cats data structures, dp, sortings	1900	x3716
1932A	Thorns and Coins dp, greedy, implementation	800	x28099
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x318
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1051
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2484
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3878
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1581
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4412
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1609
1927G	Paint Charges data structures, dp, greedy, math	2300	x1560
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x19632
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3263
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1591

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