Problemset - Codeforces

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Codeforces Round (Div. 2)
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number theory

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Problems

#	Name
1152C	Neko does Maths brute force, math, number theory	1800	x6562
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14921
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3300	x319
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1088
1144E	Median String bitmasks, math, number theory, strings	1900	x4086
1143B	Nirvana brute force, math, number theory	1200	x10165
1139D	Steps to One dp, math, number theory, probabilities	2300	x2094
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x1515
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x11311
1133B	Preparation for International Women's Day math, number theory	1200	x12497
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1841
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2794
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7290
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7690
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x9067
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x497
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22809
1107D	Compression dp, implementation, math, number theory	1800	x3695
1107B	Digital root math, number theory	1000	x15276
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x959
1103E	Radix sum fft, math, number theory	3400	x222
1101D	GCD Counting data structures, dfs and similar, dp, number theory, trees	2000	x4476
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x219
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1219
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2629
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x200
1091C	New Year and the Sphere Transmission math, number theory	1400	x9877
1081E	Missing Numbers binary search, constructive algorithms, greedy, math, number theory	1900	x2551
1076B	Divisor Subtraction implementation, math, number theory	1200	x12690
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2278
1068B	LCM math, number theory	1200	x11252
1062B	Math greedy, math, number theory	1500	x8529
1061C	Multiplicity data structures, dp, implementation, math, number theory	1700	x8543
1056B	Divide Candies math, number theory	1600	x4166
1055C	Lucky Days math, number theory	1900	x1848
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x176
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16791
1045B	Space Isaac hashing, number theory	2400	x505
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2218
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1559
1036E	Covered Points fft, geometry, number theory	2400	x1472
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x863
1034A	Enlarge GCD number theory	1800	x8447
1033D	Divisors interactive, math, number theory	2000	x2327
1033B	Square Difference math, number theory	1100	x9411
1030G	Linear Congruential Generator number theory	2900	x351
1030D	Vasya and Triangle geometry, number theory	1800	x5751
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2508
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x299
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3528
1025B	Weakened Common Divisor brute force, greedy, number theory	1600	x7817
1016G	Appropriate Team bitmasks, math, number theory	2700	x259
1010C	Border number theory	1800	x4700
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x944
1005D	Polycarp and Div 3 dp, greedy, number theory	1500	x9943
995E	Number Clicker divide and conquer, graphs, meet-in-the-middle, number theory	2700	x637
992B	Nastya Studies Informatics math, number theory	1600	x6153
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x1763
986F	Oppa Funcan Style Remastered graphs, math, number theory, shortest paths	3300	x570
986E	Prince's Problem brute force, data structures, math, number theory, trees	2800	x708
986A	Fair graphs, greedy, number theory, shortest paths	1600	x6683
982E	Billiard geometry, number theory	2600	x691
980D	Perfect Groups dp, math, number theory	2100	x2479
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1719
963C	Cutting Rectangle brute force, math, number theory	2600	x561
963A	Alternating Sum math, number theory	1800	x3246
961G	Partitions combinatorics, math, number theory	2700	x1320
959D	Mahmoud and Ehab and another array construction task constructive algorithms, greedy, math, number theory	1900	x3067
955C	Sad powers binary search, math, number theory	2100	x2656
946B	Weird Subtraction Process math, number theory	1100	x10743
937B	Vile Grasshoppers brute force, math, number theory	1400	x6822
926B	Add Points math, number theory	1800	x1622
923A	Primal Sport math, number theory	1700	x4992
922F	Divisibility constructive algorithms, dp, greedy, number theory	2400	x625
922C	Cave Painting brute force, number theory	1600	x6947
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1702
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6413
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1908
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x27395
915G	Coprime Arrays math, number theory	2300	x1155
914D	Bash and a Tough Math Puzzle data structures, number theory	1900	x5130
913G	Power Substring math, number theory	3200	x197
912E	Prime Gift binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers	2400	x1508
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11664
906D	Power Tower chinese remainder theorem, math, number theory	2700	x1997
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3043
900B	Position in Fraction math, number theory	1300	x7735
898B	Proper Nutrition brute force, implementation, number theory	1100	x9377
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x520
894B	Ralph And His Magic Field combinatorics, constructive algorithms, math, number theory	1800	x4395
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3363
891A	Pride brute force, dp, greedy, math, number theory	1500	x9812
876B	Divisiblity of Differences implementation, math, number theory	1300	x8891
870F	Paths data structures, number theory	2700	x604
870C	Maximum splitting dp, greedy, math, number theory	1300	x9003
858A	k-rounding brute force, math, number theory	1100	x7919
852F	Product transformation combinatorics, math, number theory	2200	x563
850B	Arpa and a list of numbers implementation, number theory	2100	x1985
842C	Ilya And The Tree dfs and similar, graphs, math, number theory, trees	2000	x3432
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6967