Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
68B	Energy exchange binary search	1600	x4787
68A	Irrational problem implementation, number theory	1100	x4998
67E	Save the City! geometry	2500	x319
67D	Optical Experiment binary search, data structures, dp	1900	x1507
67C	Sequence of Balls dp	2600	x691
67B	Restoration of the Permutation greedy	1800	x781
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2149
66E	Petya and Post data structures, dp	2000	x773
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3217
66C	Petya and File System data structures, implementation	1800	x1087
66B	Petya and Countryside brute force, implementation	1100	x20974
66A	Petya and Java implementation, strings	1300	x6506
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	x439
65C	Harry Potter and the Golden Snitch binary search, geometry	2100	x810
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1396
65A	Harry Potter and Three Spells implementation, math	1800	x1830
64I	Sort the Table *special problem, sortings	2400	x91
64H	Table Bowling *special problem, sortings	2300	x117
64G	Path Canonization *special problem	2200	x123
64F	Domain *special problem, expression parsing	2000	x184
64E	Prime Segment *special problem, brute force, math, number theory	1800	x250
64D	Presents *special problem, greedy	1800	x293
64C	Table *special problem, greedy, implementation, math	1600	x342
64B	Expression *special problem, expression parsing	1500	x1026
64A	Factorial *special problem, implementation	1300	x3328
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x775
63D	Dividing Island constructive algorithms	1900	x1276
63C	Bulls and Cows brute force, implementation	1700	x1756
63B	Settlers' Training implementation	1200	x4883
63A	Sinking Ship implementation, sortings, strings	900	x11881
62E	World Evil dp, flows	2700	x236
62D	Wormhouse dfs and similar, graphs	2300	x376
62C	Inquisition geometry, implementation, sortings	2300	x254
62B	Tyndex.Brome binary search, implementation	1800	x1299
62A	A Student's Dream greedy, math	1300	x3482
61E	Enemy is weak data structures, trees	1900	x11726
61D	Eternal Victory dfs and similar, graphs, greedy, shortest paths, trees	1800	x6703
61C	Capture Valerian math	2000	x724
61B	Hard Work strings	1300	x3908
61A	Ultra-Fast Mathematician implementation	800	x115995
60E	Mushroom Gnomes math, matrices	2600	x328
60D	Savior brute force, dsu, math	2500	x464
60C	Mushroom Strife brute force, dfs and similar	2100	x582
60B	Serial Time! dfs and similar, dsu	1400	x4746
60A	Where Are My Flakes? implementation, two pointers	1300	x3686
59E	Shortest Path graphs, shortest paths	2000	x3675
59D	Team Arrangement constructive algorithms, greedy, implementation	2000	x645
59C	Title expression parsing	1600	x2138
59B	Fortune Telling implementation, number theory	1200	x7120
59A	Word implementation, strings	800	x186030
58E	Expression dp	2400	x410
58D	Calendar greedy, strings	2000	x740
58C	Trees brute force	1800	x2052
58B	Coins greedy	1300	x12379
58A	Chat room greedy, strings	1000	x135058
57E	Chess math, shortest paths	3000	x264
57D	Journey dp, math	2500	x346
57C	Array combinatorics, math	1900	x2822
57B	Martian Architecture implementation	1600	x1028
57A	Square Earth? dfs and similar, greedy, implementation	1300	x2945
56E	Domino Principle binary search, data structures, sortings	2200	x2460
56D	Changing a String dp	2100	x1692
56C	Corporation Mail data structures, expression parsing, implementation	1700	x1177
56B	Spoilt Permutation implementation	1300	x3769
56A	Bar implementation	1000	x8836
55E	Very simple problem geometry, two pointers	2500	x715
55D	Beautiful numbers dp, number theory	2500	x3995
55C	Pie or die games	1900	x1670
55B	Smallest number brute force	1600	x2933
55A	Flea travel implementation, math	1200	x3522
54E	Vacuum Сleaner geometry	2700	x194
54D	Writing a Song brute force, dp, strings	2100	x563
54C	First Digit Law dp, math, probabilities	2000	x1363
54B	Cutting Jigsaw Puzzle hashing, implementation	1800	x796
54A	Presents implementation	1300	x2126
53E	Dead Ends bitmasks, dp	2500	x1028
53D	Physical Education sortings	1500	x2070
53C	Little Frog constructive algorithms	1200	x6582
53B	Blog Photo binary search, implementation	1700	x1421
53A	Autocomplete implementation	1100	x5203
52C	Circular RMQ data structures	2200	x9360
52B	Right Triangles combinatorics	1600	x2105
52A	123-sequence implementation	900	x9045
51F	Caterpillar dfs and similar, dp, graphs, trees	2800	x655
51E	Pentagon combinatorics, graphs, matrices	2400	x414
51D	Geometrical problem implementation	2200	x499
51C	Three Base Stations binary search, greedy	1800	x2134
51B	bHTML Tables Analisys expression parsing	1700	x878
51A	Cheaterius's Problem implementation	1300	x1852
50E	Square Equation Roots math	2300	x368
50D	Bombing binary search, dp, probabilities	2100	x645
50C	Happy Farm 5 geometry	2000	x788
50B	Choosing Symbol Pairs strings	1500	x5772
50A	Domino piling greedy, math	800	x259872
49E	Common ancestor dp	2300	x683
49D	Game brute force, dp, implementation	1800	x1935
49C	Disposition constructive algorithms, math	1700	x1710
49B	Sum math	1500	x2512
49A	Sleuth implementation	800	x13703