Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
2 days
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number theory

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Problems

#	Name
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x76
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x88
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x104
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x132
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x144
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x174
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x188
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x215
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x858
1310F	Bad Cryptography math, number theory	3400	x67
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x79
1190F	Tokitsukaze and Powers number theory, probabilities	3400	x87
756F	Long number expression parsing, math, number theory	3400	x89
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x137
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x212
1103E	Radix sum fft, math, number theory	3400	x220
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x508
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x117
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x145
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x238
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3300	x315
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x316
986F	Oppa Funcan Style Remastered graphs, math, number theory, shortest paths	3300	x564
582D	Number of Binominal Coefficients dp, math, number theory	3300	x608
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x81
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x122
500G	New Year Running number theory, trees	3200	x156
913G	Power Substring math, number theory	3200	x194
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x197
1223G	Wooden Raft binary search, math, number theory	3200	x226
1656H	Equal LCM Subsets data structures, math, number theory	3200	x415
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x859
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x137
1815E	Bosco and Particle dp, math, number theory, strings	3100	x326
516E	Drazil and His Happy Friends math, number theory	3100	x474
653G	Move by Prime combinatorics, math, number theory	3100	x516
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x522
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x618
809E	Surprise me! divide and conquer, math, number theory, trees	3100	x722
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1793
1575C	Cyclic Sum data structures, fft, number theory	3000	x155
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x183
346E	Doodle Jump math, number theory	3000	x251
1418F	Equal Product data structures, math, number theory, two pointers	3000	x356
698F	Coprime Permutation combinatorics, number theory	3000	x431
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x610
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x644
1906G	Grid Game 2 games, number theory	2900	x145
1796F	Strange Triples brute force, math, number theory	2900	x169
819C	Mister B and Beacons on Field number theory	2900	x205
819D	Mister B and Astronomers number theory	2900	x216
449E	Jzzhu and Squares dp, math, number theory	2900	x282
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x301
1644F	Basis combinatorics, fft, math, number theory	2900	x313
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x329
717A	Festival Organization combinatorics, math, number theory	2900	x333
1030G	Linear Congruential Generator number theory	2900	x349
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x373
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x423
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x449
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x517
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x595
1198F	GCD Groups 2 greedy, number theory, probabilities	2900	x819
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1043
1285F	Classical? binary search, combinatorics, number theory	2900	x1065
338D	GCD Table chinese remainder theorem, math, number theory	2900	x1095
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x354
1732E	Location data structures, dp, math, number theory	2800	x414
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x470
1879F	Last Man Standing brute force, data structures, number theory	2800	x471
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x500
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x579
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x663
986E	Prince's Problem brute force, data structures, math, number theory, trees	2800	x703
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x707
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x722
1208G	Polygons greedy, math, number theory	2800	x727
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x983
774F	Pens And Days Of Week *special problem, binary search, number theory	2700	x104
774G	Perfectionist Arkadiy *special problem, number theory	2700	x173
1016G	Appropriate Team bitmasks, math, number theory	2700	x256
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x313
1182F	Maximum Sine binary search, data structures, number theory	2700	x329
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x494
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x546
870F	Paths data structures, number theory	2700	x593
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x615
995E	Number Clicker divide and conquer, graphs, meet-in-the-middle, number theory	2700	x615
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x777
838D	Airplane Arrangements math, number theory	2700	x817
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x834
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x852
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x937
1422F	Boring Queries data structures, math, number theory	2700	x971
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x975
961G	Partitions combinatorics, math, number theory	2700	x1296
906D	Power Tower chinese remainder theorem, math, number theory	2700	x1974
303D	Rotatable Number math, number theory	2600	x278
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x297

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