Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
10:52:13
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number theory

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Problems

#	Name
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory		x3651
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory		x860
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3126
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1606
1954C	Long Multiplication greedy, math, number theory	1200	x14652
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11409
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19578
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2028
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x466
1945B	Fireworks math, number theory	900	x19180
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x179
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17522
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20247
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29603
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x863
1932E	Final Countdown implementation, math, number theory	1600	x6665
1932B	Chaya Calendar number theory	1100	x18178
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2414
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15649
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1512
1928C	Physical Education Lesson brute force, math, number theory	1600	x7390
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9822
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18091
1920C	Partitioning the Array brute force, math, number theory	1600	x11718
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1644
1916G	Optimizations From Chelsu divide and conquer, dp, number theory, trees	3500	x132
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23490
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24450
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1240
1909D	Split Plus K greedy, math, number theory	1900	x3952
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13711
1907E	Good Triples brute force, combinatorics, number theory	1600	x8714
1906G	Grid Game 2 games, number theory	2900	x144
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12158
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3671
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12119
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17953
1899A	Game with Integers games, math, number theory	800	x37378
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x85
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x77
1884D	Counting Rhyme dp, math, number theory	2100	x2786
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x950
1881D	Divide and Equalize math, number theory	1300	x14245
1879F	Last Man Standing brute force, data structures, number theory	2800	x470
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3689
1877C	Joyboard math, number theory	1200	x10006
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7455
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10742
1872C	Non-coprime Split math, number theory	1100	x21856
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7168
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12546
1859A	United We Stand constructive algorithms, math, number theory	800	x29104
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21876
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10588
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23610
1852A	Ntarsis' Set binary search, math, number theory	1800	x7537
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16998
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x740
1848C	Vika and Price Tags math, number theory	1800	x5919
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x351
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24441
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x637
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11582
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13400
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x444
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2045
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1514
1828B	Permutation Swap math, number theory	900	x20532
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12746
1826B	Lunatic Never Content math, number theory	1100	x15642
1823C	Strongly Composite greedy, math, number theory	1300	x11638
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2291
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6457
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16915
1815E	Bosco and Particle dp, math, number theory, strings	3100	x324
1812F	Factorization *special problem, number theory		x951
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4332
1811E	Living Sequence binary search, dp, math, number theory	1500	x11505
1810B	Candies constructive algorithms, math, number theory	800	x17118
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x328
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11480
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	x7754
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1182
1796F	Strange Triples brute force, math, number theory	2900	x167
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3336
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1301
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x757
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16867
1787B	Number Factorization greedy, math, number theory	1100	x12667
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2017
1781D	Many Perfect Squares brute force, math, number theory	1800	x5223
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x666
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	x1297
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16497
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x596
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7680
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5742

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