Problemset - Codeforces

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Codeforces Round 987 (Div. 2)
10:01:28
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Problems

#	Name
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x6634
1978D	Elections data structures, greedy, implementation, math	1600	x11318
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x14966
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x6760
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x10403
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x6029
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3575
1974E	Money Buys Happiness dp	1800	x8042
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x14832
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x15786
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x8382
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x14117
1971G	XOUR data structures, dsu, sortings	1700	x9288
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x10010
1971E	Find the Car binary search, math, sortings	1500	x14312
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1353
1970E1	Trails (Easy) dp	1800	x2211
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1584
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2763
1970C1	Game on Tree (Easy) games	1400	x3488
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x1152
1969D	Shop Game data structures, greedy, math, sortings	1900	x4627
1969C	Minimizing the Sum dp, implementation	1700	x8786
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x4293
1968F	Equal XOR Segments binary search, data structures	1800	x5524
1968E	Cells Arrangement constructive algorithms	1600	x10452
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x14963
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x13328
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x12519
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6742
1965A	Everything Nim games, greedy, math, sortings	1400	x13783
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x256
1958D	Staircase *special problem	1600	x532
1958C	Firewood *special problem	1500	x723
1958B	Clock in the Pool *special problem, math	1400	x901
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4498
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9709
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12946
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4568
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7142
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8677
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15526
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x21332
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6215
1951C	Ticket Hoarding greedy, math, sortings	1400	x11718
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4406
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9194
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x14508
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1871
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1775
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x3313
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9502
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x16970
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4757
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11025
1945F	Kirill and Mushrooms data structures, sortings	1900	x4256
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8237
1945D	Seraphim the Owl dp, greedy	1300	x14550
1943A	MEX Game 1 games, greedy	1300	x18071
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6185
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x11009
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x6086
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9760
1938H	Pho Restaurant	1600	x2164
1938C	Bit Counting Sequence	1900	x1476
1937B	Binary Path dp, greedy, implementation	1300	x15117
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7503
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8299
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8242
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6845
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x11312
1932F	Feed Cats data structures, dp, sortings	1900	x4169
1932E	Final Countdown implementation, math, number theory	1600	x8287
1932D	Card Game greedy, implementation	1400	x11541
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x15882
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x8143
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x16126
1931D	Divisible Pairs combinatorics, math, number theory	1300	x19219
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x4154
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x7158
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4838
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x15053
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x4309
1928C	Physical Education Lesson brute force, math, number theory	1600	x8656
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x4442
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x14169
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x21829
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x3639
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x12061
1926D	Vlad and Division bitmasks, greedy	1300	x15681
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3693
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x14085
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6882
1923C	Find B constructive algorithms, greedy	1400	x15273
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7799
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5752
1922C	Closest Cities greedy, implementation, math	1300	x18687
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3923
1921E	Eat the Chip brute force, games, greedy, math	1600	x9889
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5657