Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1773L	Lisa's Sequences dp	3500	x28
1170I	Good Subsets *special problem, dp		x35
1910I	Inverse Problem *special problem, combinatorics, dp	2700	x39
1297H	Paint the String *special problem, dp, strings		x40
1431J	Zero-XOR Array *special problem, dp	3400	x41
1211H	Road Repair in Treeland *special problem, binary search, dp, trees	3100	x41
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x42
1346I	Pac-Man 2.0 *special problem, dp	2900	x43
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees		x51
1939D	Big Persimmon *special problem, dp, games		x57
1943F	Minimum Hamming Distance dp	3500	x59
1776E	Crossing the Railways data structures, dp	3500	x60
1776K	Uniform Chemistry dp, math	3200	x63
1517H	Fly Around the World dp, geometry	3500	x63
1297G	M-numbers *special problem, dp, math		x65
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x66
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x67
1874G	Jellyfish and Inscryption dp	3500	x68
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x68
1863H	Goldberg Machine 3 dp, trees	3500	x69
1326G	Spiderweb Trees dp, geometry, trees	3500	x69
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x70
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x71
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x71
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x71
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x73
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities		x74
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x75
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x76
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x78
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x79
1533H	Submatrices *special problem, bitmasks, data structures, dp		x80
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x80
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x83
1677F	Tokitsukaze and Gems dp, math	3500	x85
1322F	Assigning Fares dp, trees	3500	x87
1746G	Olympiad Training binary search, data structures, dp, flows, geometry, implementation, sortings	3500	x88
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x91
1510H	Hard Optimization dp	3200	x94
1852F	Panda Meetups data structures, dp, flows	3500	x95
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x98
774I	Composing Of String *special problem, dp	2300	x98
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x101
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x102
457F	An easy problem about trees dp, games, greedy, trees	3200	x102
1218A	BubbleReactor dp, graphs	2800	x103
1954F	Unique Strings combinatorics, dp, math		x105
1842I	Tenzing and Necklace divide and conquer, dp, greedy	3500	x105
1854F	Mark and Spaceship brute force, dp	3500	x107
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x107
336E	Vasily the Bear and Painting Square bitmasks, combinatorics, dp, implementation	2700	x107
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x108
1237G	Balanced Distribution data structures, dp, greedy	3500	x113
865E	Hex Dyslexia bitmasks, brute force, dp, graphs	3300	x117
1924F	Anti-Proxy Attendance constructive algorithms, dp, interactive, ternary search	3500	x118
1387C	Viruses *special problem, dp, shortest paths, string suffix structures	2900	x121
424E	Colored Jenga dfs and similar, dp, probabilities	2500	x121
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x125
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x126
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x129
662E	To Hack or not to Hack brute force, dp, greedy	3100	x129
185C	Clever Fat Rat dp	2500	x129
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x130
717B	R3D3’s Summer Adventure dp, greedy	2700	x135
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x136
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x137
1431G	Number Deletion Game *special problem, dp, games, greedy	2100	x137
379G	New Year Cactus dp	3100	x138
1530H	Turing's Award data structures, dp	3400	x139
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x141
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x141
852H	Bob and stages dp, geometry	3000	x142
756E	Byteland coins combinatorics, dp, math	3200	x149
1874F	Jellyfish and OEIS dp	3500	x150
1012F	Passports dp, implementation	3400	x150
1951H	Thanos Snap binary search, dp, games, greedy, trees		x152
1210G	Mateusz and Escape Room dp	3500	x155
924F	Minimal Subset Difference dp	3200	x156
1007E	Mini Metro dp	3400	x157
156E	Mrs. Hudson's Pancakes brute force, dp	3000	x159
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x161
391F1	Stock Trading dp		x161
138E	Hellish Constraints brute force, dp, two pointers	2900	x162
1408I	Bitwise Magic dp, math	3200	x163
1250D	Conference Problem dp	3000	x164
1910E	Maximum Sum Subarrays *special problem, dp	2100	x166
1895G	Two Characters, Two Colors binary search, data structures, dp, flows, greedy	3100	x167
251E	Tree and Table dfs and similar, dp, implementation, trees	3000	x167
1804H	Code Lock bitmasks, dp	3300	x168
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x168
1585G	Poachers dp, games, graphs, trees	2500	x168
891D	Sloth dfs and similar, dp, graph matchings, trees	3100	x168
1218C	Jumping Transformers dp	2600	x170
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x175
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x179
933E	A Preponderant Reunion constructive algorithms, dp	3200	x184
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
581E	Kojiro and Furrari dp, greedy	2800	x185
980F	Cactus to Tree dp, graphs, trees	2900	x187

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