Problemset - Codeforces

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IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
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Problems

#	Name
97B	Superset constructive algorithms, divide and conquer	2300	x870
97A	Domino brute force, implementation	2400	x267
95E	Lucky Country dp, dsu, graphs	2500	x1560
95D	Horse Races dp, math	2500	x456
95C	Volleyball shortest paths	1900	x2845
95B	Lucky Numbers dp, greedy	1800	x1262
95A	Hockey implementation, strings	1600	x1694
93E	Lostborn dp, math, number theory	2600	x503
93D	Flags dp, math, matrices	2500	x359
93C	Azembler brute force, implementation	2500	x433
93B	End of Exams greedy	1900	x925
93A	Frames implementation	1700	x1971
91E	Igloo Skyscraper data structures, geometry	2500	x611
91D	Grocer's Problem constructive algorithms, graphs, greedy	2600	x277
91C	Ski Base combinatorics, dsu, graphs	2300	x907
91B	Queue binary search, data structures	1500	x6939
91A	Newspaper Headline greedy, strings	1500	x3663
89E	Fire and Ice greedy	2900	x102
89D	Space mines geometry	2500	x241
89C	Chip Play brute force, data structures, implementation	2300	x625
89B	Widget Library dp, expression parsing, graphs, implementation	2300	x527
89A	Robbery greedy	1800	x1489
88B	Keyboard implementation	1500	x4786
87E	Mogohu-Rea Idol geometry	2600	x612
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x918
87C	Interesting Game dp, games, math	2000	x1412
87B	Vasya and Types implementation, strings	1800	x1157
87A	Trains implementation, math	1500	x5438
86E	Long sequence brute force, math, matrices	2700	x191
86D	Powerful array data structures, implementation, math, two pointers	2200	x14192
86C	Genetic engineering dp, string suffix structures, trees	2500	x737
86B	Tetris revisited constructive algorithms, graph matchings, greedy, math	2200	x418
86A	Reflection math	1600	x1445
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x991
85D	Sum of Medians binary search, brute force, data structures, implementation	2300	x2083
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x549
85B	Embassy Queue data structures, greedy	1800	x988
84C	Biathlon binary search, implementation	1700	x1728
83E	Two Subsequences bitmasks, dp	2800	x485
83D	Numbers dp, math, number theory	2400	x911
83C	Track graphs, greedy, shortest paths	2400	x436
83B	Doctor binary search, math, sortings	1800	x1720
82E	Corridor geometry	2600	x218
82D	Two out of Three dp	2000	x2085
82C	General Mobilization data structures, dfs and similar, sortings	2000	x819
82B	Sets constructive algorithms, hashing, implementation	1700	x2073
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x355
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x660
81C	Average Score greedy, math, sortings	1700	x1676
81B	Sequence Formatting implementation, strings	1700	x1967
81A	Plug-in implementation	1400	x11292
79E	Security System math	2900	x138
79D	Password bitmasks, dp, shortest paths	2800	x1208
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1850
79B	Colorful Field implementation, sortings	1400	x7391
78E	Evacuation flows, graphs, shortest paths	2300	x595
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x335
78C	Beaver Game dp, games, number theory	2000	x1904
77E	Martian Food geometry	2800	x381
77D	Domino Carpet dp, implementation	2300	x332
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1044
77B	Falling Anvils math, probabilities	1800	x2677
77A	Heroes brute force, implementation	1400	x1785
76F	Tourist binary search, data structures, dp	2300	x650
76E	Points implementation, math	1700	x1729
76D	Plus and xor dp, greedy, math	1700	x2099
76C	Mutation bitmasks, dp, math	2700	x334
76B	Mice greedy, two pointers	2100	x758
76A	Gift dsu, graphs, sortings, trees	2200	x1737
75E	Ship's Shortest Path geometry, shortest paths	2400	x280
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1852
75C	Modified GCD binary search, number theory	1600	x13088
75B	Facetook Priority Wall expression parsing, implementation, strings	1500	x3344
74E	Shift It! constructive algorithms	2800	x166
74D	Hanger data structures	2400	x373
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1299
74B	Train dp, games, greedy	1500	x1561
73F	Plane of Tanks brute force, geometry	2900	x81
73E	Morrowindows math, number theory	2400	x366
73D	FreeDiv dfs and similar, graphs, greedy	2200	x646
73C	LionAge II dp	1800	x2151
73B	Need For Brake binary search, greedy, sortings	2000	x511
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1384
72I	Goofy Numbers *special problem, implementation	1500	x468
72H	Reverse It! *special problem, implementation	1600	x269
72F	Oil *special problem, greedy, math	1900	x121
72E	Ali goes shopping *special problem, brute force, strings	1800	x174
72D	Perse-script *special problem, expression parsing	2300	x76
72B	INI-file *special problem, implementation	2200	x109
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x188
71E	Nuclear Fusion bitmasks, dp	2200	x762
71D	Solitaire brute force, implementation	2200	x661
71C	Round Table Knights dp, math, number theory	1600	x6688
70E	Information Reform dp, implementation, trees	2700	x519
70D	Professor's task data structures, geometry	2700	x1010
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x585
70B	Text Messaging expression parsing, greedy, strings	1600	x1792
69E	Subsegments data structures, implementation	1800	x4470
69D	Dot dp, games	1900	x1019
69C	Game implementation	2000	x596