Problemset - Codeforces

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Educational Codeforces Round 170 (Rated for Div. 2)
13 days

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Problems

#	Name
84C	Biathlon binary search, implementation	1700	x1703
84A	Toy Army math, number theory	900	x14948
83E	Two Subsequences bitmasks, dp	2800	x473
83D	Numbers dp, math, number theory	2400	x878
83C	Track graphs, greedy, shortest paths	2400	x427
83B	Doctor binary search, math, sortings	1800	x1692
83A	Magical Array math	1300	x6221
82E	Corridor geometry	2600	x217
82D	Two out of Three dp	2000	x2020
82C	General Mobilization data structures, dfs and similar, sortings	2000	x806
82B	Sets constructive algorithms, hashing, implementation	1700	x2033
82A	Double Cola implementation, math	1100	x30154
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x341
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x645
81C	Average Score greedy, math, sortings	1700	x1663
81B	Sequence Formatting implementation, strings	1700	x1952
81A	Plug-in implementation	1400	x10691
80B	Depression geometry, math	1200	x4396
80A	Panoramix's Prediction brute force	800	x53220
79E	Security System math	2900	x131
79D	Password bitmasks, dp, shortest paths	2800	x1130
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1782
79B	Colorful Field implementation, sortings	1400	x7166
79A	Bus Game greedy	1200	x4051
78E	Evacuation flows, graphs, shortest paths	2300	x540
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x317
78C	Beaver Game dp, games, number theory	2000	x1871
78B	Easter Eggs constructive algorithms, implementation	1200	x13509
78A	Haiku implementation, strings	800	x12455
77E	Martian Food geometry	2800	x377
77D	Domino Carpet dp, implementation	2300	x326
77C	Beavermuncher-0xFF dfs and similar, dp, dsu, greedy, trees	2100	x1005
77B	Falling Anvils math, probabilities	1800	x2616
77A	Heroes brute force, implementation	1400	x1774
76F	Tourist binary search, data structures, dp	2300	x631
76E	Points implementation, math	1700	x1710
76D	Plus and xor dp, greedy, math	1700	x2062
76C	Mutation bitmasks, dp, math	2700	x310
76B	Mice greedy, two pointers	2100	x749
76A	Gift dsu, graphs, sortings, trees	2200	x1581
75E	Ship's Shortest Path geometry, shortest paths	2400	x279
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1797
75C	Modified GCD binary search, number theory	1600	x12630
75B	Facetook Priority Wall expression parsing, implementation, strings	1500	x3302
75A	Life Without Zeros implementation	1000	x26031
74E	Shift It! constructive algorithms	2800	x151
74D	Hanger data structures	2400	x369
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1282
74B	Train dp, games, greedy	1500	x1540
74A	Room Leader implementation	1000	x5139
73F	Plane of Tanks brute force, geometry	2900	x80
73E	Morrowindows math, number theory	2400	x357
73D	FreeDiv dfs and similar, graphs, greedy	2200	x638
73C	LionAge II dp	1800	x2114
73B	Need For Brake binary search, greedy, sortings	2000	x501
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1337
72I	Goofy Numbers *special problem, implementation	1500	x463
72H	Reverse It! *special problem, implementation	1600	x264
72G	Fibonacci army *special problem, dp	1000	x2190
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
72C	Extraordinarily Nice Numbers *special problem, math	1200	x916
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	x715
71D	Solitaire brute force, implementation	2200	x641
71C	Round Table Knights dp, math, number theory	1600	x6472
71B	Progress Bar implementation, math	1300	x4514
71A	Way Too Long Words strings	800	x380773
70E	Information Reform dp, implementation, trees	2700	x492
70D	Professor's task data structures, geometry	2700	x987
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x573
70B	Text Messaging expression parsing, greedy, strings	1600	x1767
70A	Cookies math	1300	x3278
69E	Subsegments data structures, implementation	1800	x4343
69D	Dot dp, games	1900	x991
69C	Game implementation	2000	x587
69B	Bets greedy, implementation	1200	x3257
69A	Young Physicist implementation, math	1000	x164564
68E	Contact geometry	2900	x71
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x465
68C	Synchrophasotron brute force	2200	x309
68B	Energy exchange binary search	1600	x4458
68A	Irrational problem implementation, number theory	1100	x4937
67E	Save the City! geometry	2500	x316
67D	Optical Experiment binary search, data structures, dp	1900	x1424
67C	Sequence of Balls dp	2600	x681
67B	Restoration of the Permutation greedy	1800	x770
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2111
66E	Petya and Post data structures, dp	2000	x740
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3161
66C	Petya and File System data structures, implementation	1800	x1025
66B	Petya and Countryside brute force, implementation	1100	x20495
66A	Petya and Java implementation, strings	1300	x6363
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	x429
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x788
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1350
65A	Harry Potter and Three Spells implementation, math	1800	x1819