Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
29:26:09
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math

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Problems

#	Name
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x235
64E	Prime Segment *special problem, brute force, math, number theory	1800	x234
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x233
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x233
1270I	Xor on Figures constructive algorithms, fft, math	3500	x227
406E	Hamming Triples implementation, math, two pointers	2800	x227
1951G	Clacking Balls combinatorics, math, probabilities	3100	x226
1223G	Wooden Raft binary search, math, number theory	3200	x226
1830E	Bully Sort data structures, math	3500	x225
1750G	Doping combinatorics, dp, math	3300	x224
497D	Gears brute force, geometry, math	2900	x224
1949K	Make Triangle constructive algorithms, math		x223
1211D	Teams *special problem, binary search, greedy, math	2000	x223
1086F	Forest Fires math	3500	x223
1346F	Dune II: Battle For Arrakis *special problem, data structures, greedy, math	2000	x218
618G	Combining Slimes dp, math, matrices, probabilities	3300	x216
335E	Counting Skyscrapers dp, math, probabilities	2800	x216
1103E	Radix sum fft, math, number theory	3400	x214
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x213
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x212
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x211
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x207
774E	Big Number and Remainder *special problem, math, number theory	2300	x206
1392I	Kevin and Grid fft, graphs, math	3300	x203
1952E	Sweep Line combinatorics, games, math		x202
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x202
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x200
1761F1	Anti-median (Easy Version) dp, math	3100	x197
280E	Sequence Transformation brute force, data structures, dp, implementation, math	3000	x196
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x195
1280E	Kirchhoff's Current Loss math	2900	x195
913G	Power Substring math, number theory	3200	x192
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x189
1765J	Hero to Zero graph matchings, math	2900	x185
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
1954F	Unique Strings combinatorics, dp, math	3100	x182
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x182
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x182
72A	Goshtasp, Vishtasp and Eidi *special problem, greedy, math	1800	x181
86E	Long sequence brute force, math, matrices	2700	x178
1242D	Number Discovery math	3400	x175
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x171
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x170
1236F	Alice and the Cactus dfs and similar, graphs, math, probabilities	3000	x168
1796F	Strange Triples brute force, math, number theory	2900	x167
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x167
401E	Olympic Games math	2500	x167
1408I	Bitwise Magic dp, math	3200	x165
329E	Evil math	3100	x163
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x162
267C	Berland Traffic math, matrices	2700	x159
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x156
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x153
756E	Byteland coins combinatorics, dp, math	3200	x151
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x150
1299E	So Mean interactive, math	3400	x148
1158E	Strange device binary search, interactive, math, trees	3400	x147
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x145
1361F	Johnny and New Toy data structures, implementation, math	3300	x145
859G	Circle of Numbers math	3000	x145
549E	Sasha Circle geometry, math	2700	x145
396E	On Iteration of One Well-Known Function math		x144
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x136
1209H	Moving Walkways data structures, greedy, math	3300	x135
1666G	Global Warming geometry, math	3100	x133
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x130
1580F	Problems for Codeforces combinatorics, fft, math	3300	x130
1346G	Two IP Cameras *special problem, math, number theory	2300	x130
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x130
1810H	Last Number combinatorics, math	2900	x129
1662E	Round Table math		x126
40D	Interesting Sequence math	2600	x124
913H	Don't Exceed math, probabilities	3400	x123
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x122
1552I	Organizing a Music Festival dfs and similar, math	3400	x121
1205F	Beauty of a Permutation constructive algorithms, math	3400	x121
802F	Marmots (hard) math, probabilities	2800	x120
868G	El Toll Caves math	3300	x119
1386B	Mixture *special problem, data structures, geometry, math, sortings	2900	x118
446E	DZY Loves Bridges math, matrices	3100	x118
79E	Security System math	2900	x118
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x117
1725D	Deducing Sortability binary search, bitmasks, math	2900	x117
113E	Sleeping combinatorics, implementation, math	2700	x116
72F	Oil *special problem, greedy, math	1900	x116
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x110
1575F	Finding Expected Value math	2900	x107
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x107
269E	String Theory geometry, math, strings	3100	x107
1912F	Fugitive Frenzy math, probabilities	3100	x104
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x102
1184D2	Parallel Universes (Hard) math, matrices	3100	x102
1381E	Origami geometry, math, sortings	3300	x100
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x99
1540E	Tasty Dishes math, matrices	3500	x98
109E	Lucky Interval brute force, math	2700	x98
1773J	Jumbled Trees constructive algorithms, math	2900	x97
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x96
128E	Birthday geometry, math	2900	x96
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x93