Problemset - Codeforces

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number theory

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Problems

#	Name
1968C	Assembly via Remainders constructive algorithms, number theory		x13184
1968A	Maximize? brute force, math, number theory		x19914
1967B2	Reverse Card (Hard Version) brute force, math, number theory		x2311
1967B1	Reverse Card (Easy Version) brute force, math, number theory		x7844
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory		x4248
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory		x901
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3239
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1664
1954C	Long Multiplication greedy, math, number theory	1200	x14968
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11561
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19785
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2049
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x470
1945B	Fireworks math, number theory	900	x19346
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x182
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17611
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20326
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29710
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x867
1932E	Final Countdown implementation, math, number theory	1600	x6708
1932B	Chaya Calendar number theory	1100	x18242
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2424
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15699
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1526
1928C	Physical Education Lesson brute force, math, number theory	1600	x7414
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9870
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18128
1920C	Partitioning the Array brute force, math, number theory	1600	x11746
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1651
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x132
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23527
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24467
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1241
1909D	Split Plus K greedy, math, number theory	1900	x3963
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13768
1907E	Good Triples brute force, combinatorics, number theory	1600	x8736
1906G	Grid Game 2 games, number theory	2900	x145
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12181
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3674
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12145
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17991
1899A	Game with Integers games, math, number theory	800	x37532
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x87
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x78
1884D	Counting Rhyme dp, math, number theory	2100	x2791
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x952
1881D	Divide and Equalize math, number theory	1300	x14294
1879F	Last Man Standing brute force, data structures, number theory	2800	x471
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3693
1877C	Joyboard math, number theory	1200	x10016
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7465
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10752
1872C	Non-coprime Split math, number theory	1100	x21886
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7172
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12556
1859A	United We Stand constructive algorithms, math, number theory	800	x29159
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21887
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10600
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23661
1852A	Ntarsis' Set binary search, math, number theory	1800	x7546
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17046
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x740
1848C	Vika and Price Tags math, number theory	1800	x5936
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x352
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24484
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x638
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11594
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13408
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x445
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2049
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1516
1828B	Permutation Swap math, number theory	900	x20561
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12760
1826B	Lunatic Never Content math, number theory	1100	x15661
1823C	Strongly Composite greedy, math, number theory	1300	x11644
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2296
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6466
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16921
1815E	Bosco and Particle dp, math, number theory, strings	3100	x325
1812F	Factorization *special problem, number theory		x952
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4333
1811E	Living Sequence binary search, dp, math, number theory	1500	x11524
1810B	Candies constructive algorithms, math, number theory	800	x17124
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x328
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11494
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x544
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x467
1798C	Candy Store greedy, math, number theory	1700	x7760
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1187
1796F	Strange Triples brute force, math, number theory	2900	x167
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3338
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1302
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x759
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16908
1787B	Number Factorization greedy, math, number theory	1100	x12674
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2018
1781D	Many Perfect Squares brute force, math, number theory	1800	x5227
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x668
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1368
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1300

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