Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
45:14:34
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Before contest
Codeforces Round 941 (Div. 2)
45:14:34
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Problems

#	Name
1192A	Building Skyscrapers *special problem		x58
1939D	Big Persimmon *special problem, dp, games		x59
993F	The Moral Dilemma	3200	x59
1666H	Heroes of Might math	3500	x60
100J	Interval Coloring *special problem, greedy, math	2400	x60
1776E	Crossing the Railways data structures, dp	3500	x61
720E	Cipher implementation	3100	x62
661H	Rotate Matrix *special problem	2400	x63
1936F	Grand Finale: Circles binary search, geometry	3300	x64
1776N	Count Permutations math	3500	x64
1776K	Uniform Chemistry dp, math	3200	x64
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x64
1517H	Fly Around the World dp, geometry	3500	x64
1431H	Rogue-like Game *special problem, brute force, greedy, two pointers	2600	x64
1070M	Algoland and Berland constructive algorithms, divide and conquer, geometry	3000	x64
853E	Lada Malina data structures, geometry	3400	x64
175F	Gnomes of Might and Magic data structures, graphs, implementation, shortest paths	3000	x64
111E	Petya and Rectangle	2900	x64
44F	BerPaint geometry, graphs	2700	x64
1949H	Division Avoidance greedy, math		x65
1297G	M-numbers *special problem, dp, math		x65
856E	Satellites	3100	x65
1599E	Two Arrays data structures, matrices	3200	x66
1423A	Wakanda Forever	3500	x66
1211G	King's Path *special problem, math, trees	2500	x66
164E	Polycarpus and Tasks	3100	x66
1310F	Bad Cryptography math, number theory	3400	x67
865F	Egg Roulette bitmasks, brute force, divide and conquer, math, meet-in-the-middle	3300	x67
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x68
1868F	LIS? data structures, greedy, implementation	3500	x68
1218B	Guarding warehouses data structures, geometry	3000	x68
1170G	Graph Decomposition *special problem, graphs		x68
223D	Spider geometry, graphs	3000	x68
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x69
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x69
1427H	Prison Break binary search, games, geometry, ternary search	3500	x69
737F	Dirty plates constructive algorithms, math	3300	x69
1874G	Jellyfish and Inscryption dp	3500	x70
1326G	Spiderweb Trees dp, geometry, trees	3500	x70
68E	Contact geometry	2900	x70
1943F	Minimum Hamming Distance dp	3500	x71
1863H	Goldberg Machine 3 dp, trees	3500	x71
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x71
162I	Truncatable primes *special problem	2000	x71
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x72
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x72
1302F	Keep talking and nobody explodes -- easy bitmasks, brute force, expression parsing		x72
923F	Public Service constructive algorithms, graphs, trees	3200	x72
153E	Euclidean Distance *special problem	2100	x72
72D	Perse-script *special problem, expression parsing	2300	x72
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x73
1491I	Ruler Of The Zoo brute force, data structures	3500	x73
1116D6	Hessenberg matrix		x73
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x74
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x74
1423E	5G Antenna Towers geometry	2700	x74
100H	Battleship *special problem, dfs and similar, implementation	2100	x74
73F	Plane of Tanks brute force, geometry	2900	x74
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x75
1055G	Jellyfish Nightmare	3500	x75
345D	Chain Letter *special problem, dfs and similar, graphs	2200	x75
207C2	Game with Two Trees	2200	x75
72B	INI-file *special problem, implementation	2200	x75
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x76
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x76
1949E	Damage per Second brute force, math		x77
1938D	Bánh Bò	3300	x77
1910H	Sum of Digits of Sums *special problem, binary search, data structures	2400	x77
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x77
1870H	Standard Graph Problem data structures, graphs, greedy, trees	3500	x77
1687F	Koishi's Unconscious Permutation fft, math	3500	x77
838F	Expected Earnings	2800	x77
207D6	The Beaver's Problem - 3	2100	x77
153D	Date Change *special problem	2000	x77
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1357D5	Quantum Classification - Dataset 7		x78
1276E	Four Stones constructive algorithms	3500	x78
771F	Bear and Isomorphic Points geometry, two pointers	3300	x78
690F2	Tree of Life (medium) constructive algorithms, hashing, trees	2700	x78
661E	Divisibility Check *special problem	2000	x78
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x79
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x79
207D10	The Beaver's Problem - 3	2100	x79
142E	Help Greg the Dwarf 2 geometry	3000	x79
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities		x80
1726H	Mainak and the Bleeding Polygon binary search, geometry, implementation, math	3500	x80
1533H	Submatrices *special problem, bitmasks, data structures, dp		x80
471E	MUH and Lots and Lots of Segments data structures, dsu	2700	x80
1357D4	Quantum Classification - Dataset 6		x81
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x81
730L	Expression Queries data structures	3200	x81
457E	Flow Optimality constructive algorithms, flows, math	3000	x81
207D9	The Beaver's Problem - 3	1800	x81
207D8	The Beaver's Problem - 3	2300	x81
1864I	Future Dominators graphs, greedy	3500	x82
126E	Pills brute force, flows	2900	x82
39K	Testing	2600	x82
648E	Собери число graphs, shortest paths	2300	x83
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x84
1889E	Doremy's Swapping Trees dfs and similar, graphs, trees	3500	x84