Problemset - Codeforces

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Codeforces Round 940 (Div. 2)
5 days

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Difficulty: —

number theory

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Problems

#	Name
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x2540
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1167
1954C	Long Multiplication greedy, math, number theory	1200	x12360
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x10749
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x18715
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x1924
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x443
1945B	Fireworks math, number theory	900	x18609
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x159
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17300
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20003
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29317
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x844
1932E	Final Countdown implementation, math, number theory	1600	x6483
1932B	Chaya Calendar number theory	1100	x17947
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2379
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15410
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1481
1928C	Physical Education Lesson brute force, math, number theory	1600	x7255
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9605
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x17957
1920C	Partitioning the Array brute force, math, number theory	1600	x11560
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1628
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x131
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23311
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24342
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1219
1909D	Split Plus K greedy, math, number theory	1900	x3911
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13529
1907E	Good Triples brute force, combinatorics, number theory	1600	x8595
1906G	Grid Game 2 games, number theory	2900	x142
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12046
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3628
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12014
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17786
1899A	Game with Integers games, math, number theory	800	x36842
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x83
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x76
1884D	Counting Rhyme dp, math, number theory	2100	x2753
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x942
1881D	Divide and Equalize math, number theory	1300	x14089
1879F	Last Man Standing brute force, data structures, number theory	2800	x465
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3663
1877C	Joyboard math, number theory	1200	x9936
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7376
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10657
1872C	Non-coprime Split math, number theory	1100	x21755
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7131
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12492
1859A	United We Stand constructive algorithms, math, number theory	800	x28866
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21776
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10509
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23390
1852A	Ntarsis' Set binary search, math, number theory	1800	x7476
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16901
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x735
1848C	Vika and Price Tags math, number theory	1800	x5890
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x346
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24240
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x631
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11541
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13317
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x435
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2014
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1497
1828B	Permutation Swap math, number theory	900	x20349
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12681
1826B	Lunatic Never Content math, number theory	1100	x15549
1823C	Strongly Composite greedy, math, number theory	1300	x11589
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2261
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6400
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16873
1815E	Bosco and Particle dp, math, number theory, strings	3100	x318
1812F	Factorization *special problem, number theory		x948
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4324
1811E	Living Sequence binary search, dp, math, number theory	1500	x11434
1810B	Candies constructive algorithms, math, number theory	800	x17095
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x325
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11419
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x540
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x463
1798C	Candy Store greedy, math, number theory	1700	x7716
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1171
1796F	Strange Triples brute force, math, number theory	2900	x165
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3316
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1294
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x752
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16731
1787B	Number Factorization greedy, math, number theory	1100	x12633
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2004
1781D	Many Perfect Squares brute force, math, number theory	1800	x5209
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x661
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1359
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1293
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16401
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x593
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7635
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5711
1771C	Hossam and Trainees greedy, math, number theory	1600	x8904
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x590

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