Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
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Problems

#	Name
93C	Azembler brute force, implementation	2500	x420
93B	End of Exams greedy	1900	x913
93A	Frames implementation	1700	x1942
91E	Igloo Skyscraper data structures, geometry	2500	x600
91D	Grocer's Problem constructive algorithms, graphs, greedy	2600	x270
91C	Ski Base combinatorics, dsu, graphs	2300	x873
89E	Fire and Ice greedy	2900	x99
89D	Space mines geometry	2500	x233
89C	Chip Play brute force, data structures, implementation	2300	x620
89B	Widget Library dp, expression parsing, graphs, implementation	2300	x520
89A	Robbery greedy	1800	x1472
87E	Mogohu-Rea Idol geometry	2600	x583
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x882
87C	Interesting Game dp, games, math	2000	x1343
87B	Vasya and Types implementation, strings	1800	x1144
86E	Long sequence brute force, math, matrices	2700	x188
86D	Powerful array data structures, implementation, math, two pointers	2200	x13529
86C	Genetic engineering dp, string suffix structures, trees	2500	x712
86B	Tetris revisited constructive algorithms, graph matchings, greedy, math	2200	x411
86A	Reflection math	1600	x1368
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x949
85D	Sum of Medians binary search, brute force, data structures, implementation	2300	x2026
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x535
85B	Embassy Queue data structures, greedy	1800	x969
84C	Biathlon binary search, implementation	1700	x1631
83E	Two Subsequences bitmasks, dp	2800	x471
83D	Numbers dp, math, number theory	2400	x853
83C	Track graphs, greedy, shortest paths	2400	x416
83B	Doctor binary search, math, sortings	1800	x1642
82E	Corridor geometry	2600	x217
82D	Two out of Three dp	2000	x2008
82C	General Mobilization data structures, dfs and similar, sortings	2000	x806
82B	Sets constructive algorithms, hashing, implementation	1700	x2029
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x340
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x644
81C	Average Score greedy, math, sortings	1700	x1660
81B	Sequence Formatting implementation, strings	1700	x1948
79E	Security System math	2900	x131
79D	Password bitmasks, dp, shortest paths	2800	x1123
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1775
78E	Evacuation flows, graphs, shortest paths	2300	x540
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x311
78C	Beaver Game dp, games, number theory	2000	x1867
77E	Martian Food geometry	2800	x373
77D	Domino Carpet dp, implementation	2300	x324
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x999
77B	Falling Anvils math, probabilities	1800	x2608
76F	Tourist binary search, data structures, dp	2300	x630
76E	Points implementation, math	1700	x1707
76D	Plus and xor dp, greedy, math	1700	x2058
76C	Mutation bitmasks, dp, math	2700	x310
76B	Mice greedy, two pointers	2100	x745
76A	Gift dsu, graphs, sortings, trees	2200	x1580
75E	Ship's Shortest Path geometry, shortest paths	2400	x277
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1790
75C	Modified GCD binary search, number theory	1600	x12575
74E	Shift It! constructive algorithms	2800	x151
74D	Hanger data structures	2400	x369
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1277
73F	Plane of Tanks brute force, geometry	2900	x80
73E	Morrowindows math, number theory	2400	x357
73D	FreeDiv dfs and similar, graphs, greedy	2200	x637
73C	LionAge II dp	1800	x2114
73B	Need For Brake binary search, greedy, sortings	2000	x495
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1334
72H	Reverse It! *special problem, implementation	1600	x264
72F	Oil *special problem, greedy, math	1900	x118
72E	Ali goes shopping *special problem, brute force, strings	1800	x153
72D	Perse-script *special problem, expression parsing	2300	x74
72B	INI-file *special problem, implementation	2200	x77
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x185
71E	Nuclear Fusion bitmasks, dp	2200	x709
71D	Solitaire brute force, implementation	2200	x637
71C	Round Table Knights dp, math, number theory	1600	x6462
70E	Information Reform dp, implementation, trees	2700	x491
70D	Professor's task data structures, geometry	2700	x986
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x572
70B	Text Messaging expression parsing, greedy, strings	1600	x1761
69E	Subsegments data structures, implementation	1800	x4324
69D	Dot dp, games	1900	x990
69C	Game implementation	2000	x581
68E	Contact geometry	2900	x71
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x463
68C	Synchrophasotron brute force	2200	x308
68B	Energy exchange binary search	1600	x4415
67E	Save the City! geometry	2500	x316
67D	Optical Experiment binary search, data structures, dp	1900	x1413
67C	Sequence of Balls dp	2600	x681
67B	Restoration of the Permutation greedy	1800	x766
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2109
66E	Petya and Post data structures, dp	2000	x733
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3152
66C	Petya and File System data structures, implementation	1800	x1018
65E	Harry Potter and Moving Staircases dfs and similar, implementation	2900	x93
65D	Harry Potter and the Sorting Hat brute force, dfs and similar, hashing	2200	x425
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x785
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1342
65A	Harry Potter and Three Spells implementation, math	1800	x1811
64I	Sort the Table *special problem, sortings	2400	x87
64H	Table Bowling *special problem, sortings	2300	x112