Problemset - Codeforces

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Codeforces Round (Div. 3)
7 days

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Difficulty: —

number theory

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Problems

#	Name
1985G	D-Function combinatorics, math, number theory		x5777
1985B	Maximum Multiple Sum brute force, math, number theory		x33870
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1105
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x11044
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x14941
1978F	Large Graph brute force, dfs and similar, dsu, graphs, number theory		x295
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5368
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x158
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x21764
1968A	Maximize? brute force, math, number theory	800	x29932
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3416
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x11355
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5688
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1080
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3823
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1929
1954C	Long Multiplication greedy, math, number theory	1200	x17152
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12833
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21298
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2198
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x548
1945B	Fireworks math, number theory	900	x20635
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x192
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18452
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21149
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30672
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x917
1932E	Final Countdown implementation, math, number theory	1600	x7229
1932B	Chaya Calendar number theory	1100	x19081
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2534
1931D	Divisible Pairs combinatorics, math, number theory	1300	x16596
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1592
1928C	Physical Education Lesson brute force, math, number theory	1600	x7802
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10652
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18710
1920C	Partitioning the Array brute force, math, number theory	1600	x12200
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1691
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x140
1916B	Two Divisors constructive algorithms, math, number theory	1000	x24189
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24849
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1277
1909D	Split Plus K greedy, math, number theory	1900	x4088
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14702
1907E	Good Triples brute force, combinatorics, number theory	1600	x9171
1906G	Grid Game 2 games, number theory	2900	x154
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12652
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3827
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12552
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18725
1899A	Game with Integers games, math, number theory	800	x39746
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x96
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x84
1884D	Counting Rhyme dp, math, number theory	2100	x2933
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x970
1881D	Divide and Equalize math, number theory	1300	x15227
1879F	Last Man Standing brute force, data structures, number theory	2800	x477
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3874
1877C	Joyboard math, number theory	1200	x10313
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7704
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11046
1872C	Non-coprime Split math, number theory	1100	x22422
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7334
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12871
1859A	United We Stand constructive algorithms, math, number theory	800	x30094
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x22253
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10827
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x24545
1852A	Ntarsis' Set binary search, math, number theory	1800	x7699
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17729
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x752
1848C	Vika and Price Tags math, number theory	1800	x6062
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x356
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x25201
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x661
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11813
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13699
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x457
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2101
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1560
1828B	Permutation Swap math, number theory	900	x21257
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12973
1826B	Lunatic Never Content math, number theory	1100	x16223
1823C	Strongly Composite greedy, math, number theory	1300	x11822
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2341
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6641
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x17019
1815E	Bosco and Particle dp, math, number theory, strings	3100	x330
1812F	Factorization *special problem, number theory		x966
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4351
1811E	Living Sequence binary search, dp, math, number theory	1500	x11745
1810B	Candies constructive algorithms, math, number theory	800	x17239
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x339
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11669
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x551
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x473
1798C	Candy Store greedy, math, number theory	1700	x7895
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1206
1796F	Strange Triples brute force, math, number theory	2900	x170
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3410
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1325

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