Problemset - Codeforces

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Codeforces Round 913 (Div. 3)
18:39:35
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combinatorics

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Problems

#	Name
1906J	Count BFS Graph combinatorics, dp		x281
1906H	Twin Friends combinatorics, dp		x277
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x483
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x111
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x2942
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x5705
1879C	Make it Alternating combinatorics, dp, greedy	1300	x12721
1876D	Lexichromatography combinatorics, dfs and similar, dsu, graphs, two pointers	2500	x708
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x6151
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x973
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x616
1866H	Happy Sets combinatorics	2100	x1415
1866B	Battling with Numbers combinatorics, math, number theory	1400	x6307
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x225
1863G	Swaps combinatorics, dp, graphs, math	2800	x462
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x14491
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1458
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x3633
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x20811
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1274
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x9656
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1326
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x297
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x101
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x15618
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x28330
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x722
1840C	Ski Resort combinatorics, math, two pointers	1000	x21508
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x20023
1838E	Count Supersequences combinatorics, dp, math	2500	x1228
1837E	Playoff Fixing combinatorics, trees	2200	x1951
1835E	Old Mobile combinatorics, dp, probabilities	3500	x174
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x5894
1832E	Combinatorics Problem brute force, combinatorics, dp	2200	x1923
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1377
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6154
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x15879
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2329
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4003
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15119
1821F	Timber combinatorics, dp, fft, math	2600	x633
1821A	Matching combinatorics, math	800	x18372
1817C	Similar Polynomials combinatorics, math	2400	x859
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x904
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1447
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1725
1810H	Last Number combinatorics, math	2900	x112
1809G	Prediction combinatorics, dp, math	2800	x357
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x361
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x573
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1129
1806D	DSU Master combinatorics, dp, dsu, math	2500	x782
1799G	Count Voting combinatorics, dp, math	2600	x619
1795D	Triangle Coloring combinatorics, math	1600	x7770
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3096
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x342
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x605
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x7449
1788D	Moving Dots binary search, brute force, combinatorics, math, two pointers	2000	x3488
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3094
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x271
1784D	Wooden Spoon combinatorics, dp	2400	x904
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x668
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1261
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2353
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x2940
1777B	Emordnilap combinatorics, greedy, math	900	x15972
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1810
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x295
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x276
1773D	Dominoes combinatorics, flows, graph matchings, greedy	2600	x378
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x20966
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x530
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1224
1768E	Partial Sorting combinatorics, math, number theory	2300	x1672
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x8790
1765C	Card Guessing combinatorics, dp, probabilities	2600	x323
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2492
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1869
1762E	Tree Sum combinatorics, math, trees	2600	x536
1762C	Binary Strings are Fun combinatorics, math	1400	x8327
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x69
1761D	Carry Bit combinatorics, math	2100	x2172
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x735
1750G	Doping combinatorics, dp, math	3300	x198
1750F	Majority combinatorics, dp, math, strings	2700	x688
1750D	Count GCD combinatorics, math, number theory	1800	x5111
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x4944
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2519
1747E	List Generation combinatorics, dp, math	2900	x456
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x227
1743A	Password brute force, combinatorics, implementation, math	800	x25264
1740F	Conditional Mix combinatorics, dp, math	2600	x700
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8245
1738E	Balance Addicts combinatorics, dp, math, two pointers	2300	x1391
1737E	Ela Goes Hiking combinatorics, dp, math, probabilities	2500	x867
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5023
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x13787
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x618
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x556

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