Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
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Problems

#	Name
1981F	Turtle and Paths on a Tree data structures, dp, trees		x46
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x4537
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees		x223
1976C	Job Interview binary search, dp, greedy, implementation, two pointers		x7092
1975I	Mind Bloom dp	3500	x18
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x515
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x4184
1974E	Money Buys Happiness dp	1800	x5648
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x135
1973A	Chess For Three brute force, dp, implementation, math	900	x19984
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x20964
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x206
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x377
1970E3	Trails (Hard) dp, matrices	2200	x436
1970E2	Trails (Medium) dp, matrices	2000	x766
1970E1	Trails (Easy) dp	1800	x1188
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x902
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x1519
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x148
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1025
1969C	Minimizing the Sum dp, implementation	1700	x6711
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1499
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3380
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x68
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x142
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1393
1958H	Composite Spells *special problem, dp	2600	x64
1958A	1-3-5 *special problem, dp	1100	x1135
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1052
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3834
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8096
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3377
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1072
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3700
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6136
1954F	Unique Strings combinatorics, dp, math	3100	x215
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5165
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x211
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3643
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20880
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1313
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x89
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x14870
1948B	Array Fix brute force, dp, greedy, implementation	1100	x20893
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x795
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2164
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9418
1946B	Maximum Sum dp, greedy, math	1100	x18403
1945D	Seraphim the Owl dp, greedy	1300	x12586
1943F	Minimum Hamming Distance dp	3500	x84
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x624
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1287
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x67
1942G	Bessie and Cards combinatorics, dp, math	2800	x381
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2492
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8391
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16913
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x30296
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26958
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	x13398
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7296
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x17033
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2244
1932F	Feed Cats data structures, dp, sortings	1900	x3493
1932A	Thorns and Coins dp, greedy, implementation	800	x27222
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x258
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1013
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2400
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3746
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1540
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4249
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1578
1927G	Paint Charges data structures, dp, greedy, math	2300	x1517
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18690
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	x10362
1926C	Vlad and a Sum of Sum of Digits dp, implementation	1200	x23737
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3289
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x134
1924D	Balanced Subsequences combinatorics, dp, math	2700	x790
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12570
1923E	Count Paths data structures, dfs and similar, dp, dsu, graphs, trees	2000	x3276
1923B	Monsters Attack! dp, greedy, implementation	1100	x16443
1922F	Replace on Segment dp, graph matchings	2500	x1182
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
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2409
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x750
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x786
1919C	Grouping Increases data structures, dp, greedy	1400	x17082
1918D	Blocking Elements binary search, data structures, dp, implementation, two pointers	1900	x4341
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x908
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1678
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19761
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x503
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x585
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x134

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