Problemset - Codeforces

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Problems

#	Name
91C	Ski Base combinatorics, dsu, graphs	2300	x886
89E	Fire and Ice greedy	2900	x100
89D	Space mines geometry	2500	x239
89C	Chip Play brute force, data structures, implementation	2300	x624
89B	Widget Library dp, expression parsing, graphs, implementation	2300	x525
89A	Robbery greedy	1800	x1483
87E	Mogohu-Rea Idol geometry	2600	x604
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x909
87C	Interesting Game dp, games, math	2000	x1386
87B	Vasya and Types implementation, strings	1800	x1155
86E	Long sequence brute force, math, matrices	2700	x189
86D	Powerful array data structures, implementation, math, two pointers	2200	x13936
86C	Genetic engineering dp, string suffix structures, trees	2500	x728
86B	Tetris revisited constructive algorithms, graph matchings, greedy, math	2200	x415
86A	Reflection math	1600	x1392
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x959
85D	Sum of Medians binary search, brute force, data structures, implementation	2300	x2058
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x542
85B	Embassy Queue data structures, greedy	1800	x982
84C	Biathlon binary search, implementation	1700	x1709
83E	Two Subsequences bitmasks, dp	2800	x480
83D	Numbers dp, math, number theory	2400	x890
83C	Track graphs, greedy, shortest paths	2400	x432
83B	Doctor binary search, math, sortings	1800	x1703
82E	Corridor geometry	2600	x217
82D	Two out of Three dp	2000	x2044
82C	General Mobilization data structures, dfs and similar, sortings	2000	x810
82B	Sets constructive algorithms, hashing, implementation	1700	x2062
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x351
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x652
81C	Average Score greedy, math, sortings	1700	x1672
81B	Sequence Formatting implementation, strings	1700	x1957
79E	Security System math	2900	x136
79D	Password bitmasks, dp, shortest paths	2800	x1187
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1816
78E	Evacuation flows, graphs, shortest paths	2300	x581
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x330
78C	Beaver Game dp, games, number theory	2000	x1888
77E	Martian Food geometry	2800	x380
77D	Domino Carpet dp, implementation	2300	x329
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1038
77B	Falling Anvils math, probabilities	1800	x2634
76F	Tourist binary search, data structures, dp	2300	x641
76E	Points implementation, math	1700	x1720
76D	Plus and xor dp, greedy, math	1700	x2075
76C	Mutation bitmasks, dp, math	2700	x314
76B	Mice greedy, two pointers	2100	x752
76A	Gift dsu, graphs, sortings, trees	2200	x1609
75E	Ship's Shortest Path geometry, shortest paths	2400	x280
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1832
75C	Modified GCD binary search, number theory	1600	x12887
74E	Shift It! constructive algorithms	2800	x155
74D	Hanger data structures	2400	x370
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1290
73F	Plane of Tanks brute force, geometry	2900	x81
73E	Morrowindows math, number theory	2400	x361
73D	FreeDiv dfs and similar, graphs, greedy	2200	x643
73C	LionAge II dp	1800	x2126
73B	Need For Brake binary search, greedy, sortings	2000	x507
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1356
72H	Reverse It! *special problem, implementation	1600	x267
72F	Oil *special problem, greedy, math	1900	x120
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	x187
71E	Nuclear Fusion bitmasks, dp	2200	x741
71D	Solitaire brute force, implementation	2200	x657
71C	Round Table Knights dp, math, number theory	1600	x6563
70E	Information Reform dp, implementation, trees	2700	x505
70D	Professor's task data structures, geometry	2700	x997
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x581
70B	Text Messaging expression parsing, greedy, strings	1600	x1780
69E	Subsegments data structures, implementation	1800	x4401
69D	Dot dp, games	1900	x1014
69C	Game implementation	2000	x592
68E	Contact geometry	2900	x72
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x472
68C	Synchrophasotron brute force	2200	x311
68B	Energy exchange binary search	1600	x4664
67E	Save the City! geometry	2500	x318
67D	Optical Experiment binary search, data structures, dp	1900	x1456
67C	Sequence of Balls dp	2600	x689
67B	Restoration of the Permutation greedy	1800	x778
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2123
66E	Petya and Post data structures, dp	2000	x758
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3187
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	x433
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	x1378
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	x339