Problemset - Codeforces

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Codeforces Round 944 (Div. 4)
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number theory

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Problems

#	Name
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2987
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2882
1731E	Graph Cost dp, greedy, math, number theory	2000	x2661
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2577
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2472
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2440
1033D	Divisors interactive, math, number theory	2000	x2304
78C	Beaver Game dp, games, number theory	2000	x1801
10C	Digital Root number theory	2000	x1391
251C	Number Transformation dp, greedy, number theory	2000	x1011
216E	Martian Luck math, number theory	2000	x543
474F	Ant colony data structures, math, number theory	2100	x7704
1499D	The Number of Pairs dp, math, number theory	2100	x5461
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4738
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4094
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3651
632D	Longest Subsequence brute force, math, number theory	2100	x3382
498C	Array and Operations flows, graph matchings, number theory	2100	x3302
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3297
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3290
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3141
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2978
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2934
1884D	Counting Rhyme dp, math, number theory	2100	x2805
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2782
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2779
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2762
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2664
955C	Sad powers binary search, math, number theory	2100	x2462
980D	Perfect Groups dp, math, number theory	2100	x2412
776E	The Holmes Children math, number theory	2100	x2101
348B	Apple Tree dfs and similar, number theory, trees	2100	x2044
850B	Arpa and a list of numbers implementation, number theory	2100	x1976
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1825
1510D	Digits dp, math, number theory	2100	x1798
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1723
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1386
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1078
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x949
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x934
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x932
225E	Unsolvable math, number theory	2100	x777
215E	Periodical Numbers combinatorics, dp, number theory	2100	x538
306C	White, Black and White Again combinatorics, number theory	2100	x440
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6146
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4938
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3967
1389E	Calendar Ambiguity math, number theory	2200	x3110
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3066
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2771
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x2768
839D	Winter is here combinatorics, dp, math, number theory	2200	x2688
616E	Sum of Remainders implementation, math, number theory	2200	x2681
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2200	x2619
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2616
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2560
1717E	Madoka and The Best University math, number theory	2200	x2474
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2305
1646E	Power Board brute force, dp, math, number theory	2200	x2301
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2261
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2215
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2079
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1985
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1959
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1809
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1758
1763E	Node Pairs dp, graphs, math, number theory	2200	x1699
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1684
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1679
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1446
691F	Couple Cover brute force, dp, number theory	2200	x1246
113C	Double Happiness brute force, math, number theory	2200	x1201
337E	Divisor Tree brute force, number theory, trees	2200	x1005
45G	Prime Problem number theory	2200	x994
1575G	GCD Festival math, number theory	2200	x641
852F	Product transformation combinatorics, math, number theory	2200	x542
271E	Three Horses constructive algorithms, math, number theory	2200	x478
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4259
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3241
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2703
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2646
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2525
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2509
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2296
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2177
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2157
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2141
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2063
623B	Array GCD dp, greedy, number theory	2300	x2044
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2039
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2028
1139D	Steps to One dp, math, number theory, probabilities	2300	x1987
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1975
1768E	Partial Sorting combinatorics, math, number theory	2300	x1783
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1657
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1649
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1594
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1540
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1428
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1372