Problemset - Codeforces

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Codeforces Round 957 (Div. 3)
37:51:30
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number theory

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Problems

#	Name
1986G2	Permutation Problem (Hard Version) brute force, data structures, hashing, math, number theory	2500	x750
1986G1	Permutation Problem (Simple Version) binary search, brute force, combinatorics, data structures, math, number theory	2200	x1079
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x6748
1985G	D-Function combinatorics, math, number theory	1600	x7380
1985B	Maximum Multiple Sum brute force, math, number theory	800	x38730
1983E	I Love Balls combinatorics, math, number theory, probabilities		x1219
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x5703
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x14277
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1300
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x12388
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16520
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory, two pointers	2400	x1042
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5836
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x176
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x22662
1968A	Maximize? brute force, math, number theory	800	x31012
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3524
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x11865
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5923
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1117
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3992
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2001
1954C	Long Multiplication greedy, math, number theory	1200	x17776
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13199
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21720
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2248
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x565
1945B	Fireworks math, number theory	900	x21173
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x201
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18902
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21545
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x31149
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x943
1932E	Final Countdown implementation, math, number theory	1600	x7457
1932B	Chaya Calendar number theory	1100	x19565
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2574
1931D	Divisible Pairs combinatorics, math, number theory	1300	x17091
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1608
1928C	Physical Education Lesson brute force, math, number theory	1600	x7967
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10957
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x19002
1920C	Partitioning the Array brute force, math, number theory	1600	x12468
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1706
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x140
1916B	Two Divisors constructive algorithms, math, number theory	1000	x24530
1916A	2023 constructive algorithms, implementation, math, number theory	800	x25059
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1297
1909D	Split Plus K greedy, math, number theory	1900	x4145
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x15197
1907E	Good Triples brute force, combinatorics, number theory	1600	x9424
1906G	Grid Game 2 games, number theory	2900	x157
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12895
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3905
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12806
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x19134
1899A	Game with Integers games, math, number theory	800	x40832
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x98
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x87
1884D	Counting Rhyme dp, math, number theory	2100	x3001
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x979
1881D	Divide and Equalize math, number theory	1300	x15704
1879F	Last Man Standing brute force, data structures, number theory	2800	x491
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3942
1877C	Joyboard math, number theory	1200	x10496
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7859
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11207
1872C	Non-coprime Split math, number theory	1100	x22665
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7429
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13015
1859A	United We Stand constructive algorithms, math, number theory	800	x30542
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x22459
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10964
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x25000
1852A	Ntarsis' Set binary search, math, number theory	1800	x7772
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x18032
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x761
1848C	Vika and Price Tags math, number theory	1800	x6125
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x359
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x25703
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x677
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11953
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13875
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x463
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2124
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1571
1828B	Permutation Swap math, number theory	900	x21644
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13112
1826B	Lunatic Never Content math, number theory	1100	x16541
1823C	Strongly Composite greedy, math, number theory	1300	x11944
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2359
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6799
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x17095
1815E	Bosco and Particle dp, math, number theory, strings	3100	x332
1812F	Factorization *special problem, number theory		x969
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4360
1811E	Living Sequence binary search, dp, math, number theory	1500	x11883
1810B	Candies constructive algorithms, math, number theory	800	x17290
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x342
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11780
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x556

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