Problemset - Codeforces

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number theory

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Problems

#	Name
1907E	Good Triples brute force, combinatorics, number theory	1600	x5287
1906G	Grid Game 2 games, number theory	2900	x60
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x8195
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x2788
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x9524
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x14308
1899A	Game with Integers games, math, number theory	800	x27051
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x36
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x38
1884D	Counting Rhyme dp, math, number theory	2100	x2296
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x848
1881D	Divide and Equalize math, number theory	1300	x11323
1879F	Last Man Standing brute force, data structures, number theory	2800	x432
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3192
1877C	Joyboard math, number theory	1200	x8358
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x6232
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x9301
1872C	Non-coprime Split math, number theory	1100	x19911
1866B	Battling with Numbers combinatorics, math, number theory	1400	x6336
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x11452
1859A	United We Stand constructive algorithms, math, number theory	800	x26064
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x20428
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x9734
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x20855
1852A	Ntarsis' Set binary search, math, number theory	1800	x6867
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x14883
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x686
1848C	Vika and Price Tags math, number theory	1800	x5442
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x311
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x22007
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x572
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x10780
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x12301
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x407
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x1826
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1381
1828B	Permutation Swap math, number theory	900	x18281
1826C	Dreaming of Freedom greedy, math, number theory	1300	x11598
1826B	Lunatic Never Content math, number theory	1100	x13833
1823C	Strongly Composite greedy, math, number theory	1300	x10737
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2062
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x5747
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16343
1815E	Bosco and Particle dp, math, number theory, strings	3100	x294
1812F	Factorization *special problem, number theory		x824
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x3946
1811E	Living Sequence binary search, dp, math, number theory	1500	x10419
1810B	Candies constructive algorithms, math, number theory	800	x16610
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x289
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x10693
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x495
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x429
1798C	Candy Store greedy, math, number theory	1700	x7269
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1073
1796F	Strange Triples brute force, math, number theory	2900	x152
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3103
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1258
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x716
1789A	Serval and Mocha's Array brute force, math, number theory	800	x15362
1787B	Number Factorization greedy, math, number theory	1100	x12140
1783E	Game of the Year brute force, data structures, math, number theory	2300	x1900
1781D	Many Perfect Squares brute force, math, number theory	1800	x4975
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x599
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1265
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1211
1780B	GCD Partition brute force, greedy, math, number theory	1100	x15387
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x540
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x6984
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5190
1771C	Hossam and Trainees greedy, math, number theory	1600	x8072
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x533
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x7870
1768E	Partial Sorting combinatorics, math, number theory	2300	x1676
1768A	Greatest Convex greedy, math, number theory	800	x27047
1766D	Lucky Chains math, number theory	1600	x7497
1765M	Minimum LCM math, number theory	1000	x10442
1764B	Doremy's Perfect Math Class math, number theory	900	x14329
1763E	Node Pairs dp, graphs, math, number theory	2200	x1585
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1874
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3069
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x15450
1762A	Divide and Conquer greedy, math, number theory	800	x18098
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3452
1759D	Make It Round brute force, number theory	1400	x10861
1758C	Almost All Multiples greedy, number theory	1400	x11804
1753B	Factorial Divisibility math, number theory	1600	x11251
1750D	Count GCD combinatorics, math, number theory	1800	x5139
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x4952
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2523
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x4813
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x9323
1742D	Coprime brute force, greedy, number theory	1100	x19341
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x93
1740A	Factorise N+M constructive algorithms, number theory	800	x18880
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x108
1736B	Playing with GCD math, number theory	1200	x16022
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2641
1732E	Location data structures, dp, math, number theory	2800	x383
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1290
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x7670

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