Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
5 days

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Difficulty: —

number theory

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Problems

#	Name
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1482
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1569
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1628
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1642
1768E	Partial Sorting combinatorics, math, number theory	2300	x1762
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1966
1139D	Steps to One dp, math, number theory, probabilities	2300	x1970
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2004
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2014
623B	Array GCD dp, greedy, number theory	2300	x2017
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2027
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2055
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2146
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2163
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2290
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2499
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2513
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2628
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2677
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3203
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4193
271E	Three Horses constructive algorithms, math, number theory	2200	x477
852F	Product transformation combinatorics, math, number theory	2200	x541
1575G	GCD Festival math, number theory	2200	x636
45G	Prime Problem number theory	2200	x989
337E	Divisor Tree brute force, number theory, trees	2200	x1002
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1194
113C	Double Happiness brute force, math, number theory	2200	x1199
691F	Couple Cover brute force, dp, number theory	2200	x1240
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1443
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1668
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1675
1763E	Node Pairs dp, graphs, math, number theory	2200	x1679
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1788
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x1926
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1944
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1981
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2208
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2256
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2261
1646E	Power Board brute force, dp, math, number theory	2200	x2284
1717E	Madoka and The Best University math, number theory	2200	x2445
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2550
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2586
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2200	x2610
616E	Sum of Remainders implementation, math, number theory	2200	x2644
839D	Winter is here combinatorics, dp, math, number theory	2200	x2675
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2759
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3010
1389E	Calendar Ambiguity math, number theory	2200	x3102
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3901
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4921
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6114
306C	White, Black and White Again combinatorics, number theory	2100	x434
215E	Periodical Numbers combinatorics, dp, number theory	2100	x536
225E	Unsolvable math, number theory	2100	x775
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x926
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x928
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x944
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1059
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1380
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1714
1510D	Digits dp, math, number theory	2100	x1787
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1817
850B	Arpa and a list of numbers implementation, number theory	2100	x1969
348B	Apple Tree dfs and similar, number theory, trees	2100	x2034
776E	The Holmes Children math, number theory	2100	x2079
980D	Perfect Groups dp, math, number theory	2100	x2402
955C	Sad powers binary search, math, number theory	2100	x2449
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2638
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2641
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2741
1884D	Counting Rhyme dp, math, number theory	2100	x2753
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2771
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2922
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2962
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3128
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3266
498C	Array and Operations flows, graph matchings, number theory	2100	x3268
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3292
632D	Longest Subsequence brute force, math, number theory	2100	x3351
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3635
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4067
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4723
1499D	The Number of Pairs dp, math, number theory	2100	x5416
474F	Ant colony data structures, math, number theory	2100	x7594
216E	Martian Luck math, number theory	2000	x539
251C	Number Transformation dp, greedy, number theory	2000	x1009
10C	Digital Root number theory	2000	x1385
78C	Beaver Game dp, games, number theory	2000	x1795
1033D	Divisors interactive, math, number theory	2000	x2300
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2379
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2458
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2563
1731E	Graph Cost dp, greedy, math, number theory	2000	x2631
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2857
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2961
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2973
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3199
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3230