Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
43:33:06
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Problems

#	Name
72I	Goofy Numbers *special problem, implementation	1500	x465
72H	Reverse It! *special problem, implementation	1600	x267
72G	Fibonacci army *special problem, dp	1000	x2347
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	x76
72C	Extraordinarily Nice Numbers *special problem, math	1200	x929
72B	INI-file *special problem, implementation	2200	x108
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x187
71E	Nuclear Fusion bitmasks, dp	2200	x751
71D	Solitaire brute force, implementation	2200	x657
71C	Round Table Knights dp, math, number theory	1600	x6604
71B	Progress Bar implementation, math	1300	x4601
71A	Way Too Long Words strings	800	x398426
70E	Information Reform dp, implementation, trees	2700	x505
70D	Professor's task data structures, geometry	2700	x1008
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x582
70B	Text Messaging expression parsing, greedy, strings	1600	x1786
70A	Cookies math	1300	x3308
69E	Subsegments data structures, implementation	1800	x4447
69D	Dot dp, games	1900	x1015
69C	Game implementation	2000	x594
69B	Bets greedy, implementation	1200	x3294
69A	Young Physicist implementation, math	1000	x170331
68E	Contact geometry	2900	x72
68D	Half-decay tree data structures, divide and conquer, dp, math, probabilities	2500	x477
68C	Synchrophasotron brute force	2200	x311
68B	Energy exchange binary search	1600	x4723
68A	Irrational problem implementation, number theory	1100	x4980
67E	Save the City! geometry	2500	x318
67D	Optical Experiment binary search, data structures, dp	1900	x1501
67C	Sequence of Balls dp	2600	x689
67B	Restoration of the Permutation greedy	1800	x780
67A	Partial Teacher dp, graphs, greedy, implementation	1800	x2139
66E	Petya and Post data structures, dp	2000	x766
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3199
66C	Petya and File System data structures, implementation	1800	x1082
66B	Petya and Countryside brute force, implementation	1100	x20808
66A	Petya and Java implementation, strings	1300	x6472
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	x1393
65A	Harry Potter and Three Spells implementation, math	1800	x1828
64I	Sort the Table *special problem, sortings	2400	x90
64H	Table Bowling *special problem, sortings	2300	x116
64G	Path Canonization *special problem	2200	x122
64F	Domain *special problem, expression parsing	2000	x182
64E	Prime Segment *special problem, brute force, math, number theory	1800	x245
64D	Presents *special problem, greedy	1800	x290
64C	Table *special problem, greedy, implementation, math	1600	x340
64B	Expression *special problem, expression parsing	1500	x1022
64A	Factorial *special problem, implementation	1300	x3189
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x768
63D	Dividing Island constructive algorithms	1900	x1270
63C	Bulls and Cows brute force, implementation	1700	x1745
63B	Settlers' Training implementation	1200	x4863
63A	Sinking Ship implementation, sortings, strings	900	x11731
62E	World Evil dp, flows	2700	x236
62D	Wormhouse dfs and similar, graphs	2300	x375
62C	Inquisition geometry, implementation, sortings	2300	x253
62B	Tyndex.Brome binary search, implementation	1800	x1296
62A	A Student's Dream greedy, math	1300	x3469
61E	Enemy is weak data structures, trees	1900	x11536
61D	Eternal Victory dfs and similar, graphs, greedy, shortest paths, trees	1800	x6655
61C	Capture Valerian math	2000	x722
61B	Hard Work strings	1300	x3895
61A	Ultra-Fast Mathematician implementation	800	x114229
60E	Mushroom Gnomes math, matrices	2600	x328
60D	Savior brute force, dsu, math	2500	x459
60C	Mushroom Strife brute force, dfs and similar	2100	x569
60B	Serial Time! dfs and similar, dsu	1400	x4709
60A	Where Are My Flakes? implementation, two pointers	1300	x3675
59E	Shortest Path graphs, shortest paths	2000	x3602
59D	Team Arrangement constructive algorithms, greedy, implementation	2000	x639
59C	Title expression parsing	1600	x2118
59B	Fortune Telling implementation, number theory	1200	x7000
59A	Word implementation, strings	800	x182531
58E	Expression dp	2400	x395
58D	Calendar greedy, strings	2000	x736
58C	Trees brute force	1800	x2047
58B	Coins greedy	1300	x12308
58A	Chat room greedy, strings	1000	x133191
57E	Chess math, shortest paths	3000	x264
57D	Journey dp, math	2500	x343
57C	Array combinatorics, math	1900	x2731
57B	Martian Architecture implementation	1600	x1024
57A	Square Earth? dfs and similar, greedy, implementation	1300	x2936
56E	Domino Principle binary search, data structures, sortings	2200	x2436
56D	Changing a String dp	2100	x1660
56C	Corporation Mail data structures, expression parsing, implementation	1700	x1173
56B	Spoilt Permutation implementation	1300	x3748
56A	Bar implementation	1000	x8761
55E	Very simple problem geometry, two pointers	2500	x709
55D	Beautiful numbers dp, number theory	2500	x3967
55C	Pie or die games	1900	x1662
55B	Smallest number brute force	1600	x2899
55A	Flea travel implementation, math	1200	x3500
54E	Vacuum Сleaner geometry	2700	x194
54D	Writing a Song brute force, dp, strings	2100	x551