Problemset - Codeforces

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Codeforces Round 954 (Div. 3)
2 days
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Difficulty: —

number theory

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Problems

#	Name
1985G	D-Function combinatorics, math, number theory	1600	x6080
1985B	Maximum Multiple Sum brute force, math, number theory	800	x34794
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1141
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x11418
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x15399
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory	2400	x714
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5495
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x167
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x21968
1968A	Maximize? brute force, math, number theory	800	x30187
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3443
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x11469
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5735
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1085
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3852
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1948
1954C	Long Multiplication greedy, math, number theory	1200	x17262
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12914
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x21391
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2209
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x549
1945B	Fireworks math, number theory	900	x20792
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x195
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18545
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21235
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30806
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x922
1932E	Final Countdown implementation, math, number theory	1600	x7283
1932B	Chaya Calendar number theory	1100	x19203
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2542
1931D	Divisible Pairs combinatorics, math, number theory	1300	x16699
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1595
1928C	Physical Education Lesson brute force, math, number theory	1600	x7855
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10714
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18763
1920C	Partitioning the Array brute force, math, number theory	1600	x12268
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1692
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x140
1916B	Two Divisors constructive algorithms, math, number theory	1000	x24254
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24902
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1282
1909D	Split Plus K greedy, math, number theory	1900	x4101
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14791
1907E	Good Triples brute force, combinatorics, number theory	1600	x9245
1906G	Grid Game 2 games, number theory	2900	x155
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12726
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3846
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12609
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18817
1899A	Game with Integers games, math, number theory	800	x39960
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	x2944
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x973
1881D	Divide and Equalize math, number theory	1300	x15337
1879F	Last Man Standing brute force, data structures, number theory	2800	x477
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3893
1877C	Joyboard math, number theory	1200	x10342
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7736
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11080
1872C	Non-coprime Split math, number theory	1100	x22472
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7350
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12893
1859A	United We Stand constructive algorithms, math, number theory	800	x30176
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x22296
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10860
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x24631
1852A	Ntarsis' Set binary search, math, number theory	1800	x7714
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17780
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x753
1848C	Vika and Price Tags math, number theory	1800	x6068
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x357
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x25281
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x663
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11849
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13736
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	x2103
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1564
1828B	Permutation Swap math, number theory	900	x21336
1826C	Dreaming of Freedom greedy, math, number theory	1300	x13006
1826B	Lunatic Never Content math, number theory	1100	x16290
1823C	Strongly Composite greedy, math, number theory	1300	x11837
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2346
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6664
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x17029
1815E	Bosco and Particle dp, math, number theory, strings	3100	x332
1812F	Factorization *special problem, number theory		x967
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4353
1811E	Living Sequence binary search, dp, math, number theory	1500	x11766
1810B	Candies constructive algorithms, math, number theory	800	x17253
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x341
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11693
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x552
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x473
1798C	Candy Store greedy, math, number theory	1700	x7907
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1207
1796F	Strange Triples brute force, math, number theory	2900	x170
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3417
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1327

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