Problemset - Codeforces

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Codeforces Round 987 (Div. 2)
13:20:56
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Problems

#	Name
86A	Reflection math	1600	x1389
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x959
85D	Sum of Medians binary search, brute force, data structures, implementation	2300	x2055
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x542
85B	Embassy Queue data structures, greedy	1800	x980
84C	Biathlon binary search, implementation	1700	x1708
83E	Two Subsequences bitmasks, dp	2800	x480
83D	Numbers dp, math, number theory	2400	x890
83C	Track graphs, greedy, shortest paths	2400	x431
83B	Doctor binary search, math, sortings	1800	x1703
82E	Corridor geometry	2600	x217
82D	Two out of Three dp	2000	x2041
82C	General Mobilization data structures, dfs and similar, sortings	2000	x810
82B	Sets constructive algorithms, hashing, implementation	1700	x2061
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x345
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x651
81C	Average Score greedy, math, sortings	1700	x1671
81B	Sequence Formatting implementation, strings	1700	x1956
81A	Plug-in implementation	1400	x11030
79E	Security System math	2900	x135
79D	Password bitmasks, dp, shortest paths	2800	x1177
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1815
79B	Colorful Field implementation, sortings	1400	x7287
78E	Evacuation flows, graphs, shortest paths	2300	x574
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x329
78C	Beaver Game dp, games, number theory	2000	x1885
77E	Martian Food geometry	2800	x379
77D	Domino Carpet dp, implementation	2300	x328
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1037
77B	Falling Anvils math, probabilities	1800	x2632
77A	Heroes brute force, implementation	1400	x1780
76F	Tourist binary search, data structures, dp	2300	x638
76E	Points implementation, math	1700	x1718
76D	Plus and xor dp, greedy, math	1700	x2073
76C	Mutation bitmasks, dp, math	2700	x313
76B	Mice greedy, two pointers	2100	x751
76A	Gift dsu, graphs, sortings, trees	2200	x1605
75E	Ship's Shortest Path geometry, shortest paths	2400	x279
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1829
75C	Modified GCD binary search, number theory	1600	x12843
75B	Facetook Priority Wall expression parsing, implementation, strings	1500	x3321
74E	Shift It! constructive algorithms	2800	x154
74D	Hanger data structures	2400	x369
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1288
74B	Train dp, games, greedy	1500	x1549
73F	Plane of Tanks brute force, geometry	2900	x81
73E	Morrowindows math, number theory	2400	x360
73D	FreeDiv dfs and similar, graphs, greedy	2200	x641
73C	LionAge II dp	1800	x2124
73B	Need For Brake binary search, greedy, sortings	2000	x507
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1354
72I	Goofy Numbers *special problem, implementation	1500	x465
72H	Reverse It! *special problem, implementation	1600	x267
72F	Oil *special problem, greedy, math	1900	x119
72E	Ali goes shopping *special problem, brute force, strings	1800	x173
72D	Perse-script *special problem, expression parsing	2300	x75
72B	INI-file *special problem, implementation	2200	x78
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x186
71E	Nuclear Fusion bitmasks, dp	2200	x741
71D	Solitaire brute force, implementation	2200	x657
71C	Round Table Knights dp, math, number theory	1600	x6556
70E	Information Reform dp, implementation, trees	2700	x501
70D	Professor's task data structures, geometry	2700	x995
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x580
70B	Text Messaging expression parsing, greedy, strings	1600	x1779
69E	Subsegments data structures, implementation	1800	x4388
69D	Dot dp, games	1900	x1013
69C	Game implementation	2000	x591
68E	Contact geometry	2900	x72
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x470
68C	Synchrophasotron brute force	2200	x311
68B	Energy exchange binary search	1600	x4649
67E	Save the City! geometry	2500	x318
67D	Optical Experiment binary search, data structures, dp	1900	x1452
67C	Sequence of Balls dp	2600	x688
67B	Restoration of the Permutation greedy	1800	x775
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2121
66E	Petya and Post data structures, dp	2000	x756
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3182
66C	Petya and File System data structures, implementation	1800	x1078
65E	Harry Potter and Moving Staircases dfs and similar, implementation	2900	x94
65D	Harry Potter and the Sorting Hat brute force, dfs and similar, hashing	2200	x431
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x789
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1375
65A	Harry Potter and Three Spells implementation, math	1800	x1824
64I	Sort the Table *special problem, sortings	2400	x89
64H	Table Bowling *special problem, sortings	2300	x114
64G	Path Canonization *special problem	2200	x121
64F	Domain *special problem, expression parsing	2000	x181
64E	Prime Segment *special problem, brute force, math, number theory	1800	x243
64D	Presents *special problem, greedy	1800	x289
64C	Table *special problem, greedy, implementation, math	1600	x338
64B	Expression *special problem, expression parsing	1500	x1019
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x766
63D	Dividing Island constructive algorithms	1900	x1269
63C	Bulls and Cows brute force, implementation	1700	x1733
62E	World Evil dp, flows	2700	x232
62D	Wormhouse dfs and similar, graphs	2300	x374
62C	Inquisition geometry, implementation, sortings	2300	x252
62B	Tyndex.Brome binary search, implementation	1800	x1293