Problemset - Codeforces

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Codeforces Round 954 (Div. 3)
5 days

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Difficulty: —

math

number theory

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Problems

#	Name
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5420
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3427
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1080
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3835
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1939
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2204
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x917
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2537
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1593
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1691
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1278
1909D	Split Plus K greedy, math, number theory	1900	x4095
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3833
1884D	Counting Rhyme dp, math, number theory	2100	x2939
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3882
1852A	Ntarsis' Set binary search, math, number theory	1800	x7703
1848C	Vika and Price Tags math, number theory	1800	x6066
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2102
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1561
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2344
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x473
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1207
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3414
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x777
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2045
1781D	Many Perfect Squares brute force, math, number theory	1800	x5326
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x678
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1326
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5893
1768E	Partial Sorting combinatorics, math, number theory	2300	x1797
1763E	Node Pairs dp, graphs, math, number theory	2200	x1722
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1982
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3768
1750D	Count GCD combinatorics, math, number theory	1800	x5649
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5371
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2692
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5365
1731E	Graph Cost dp, greedy, math, number theory	2000	x2704
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1669
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x441
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1537
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2903
1717E	Madoka and The Best University math, number theory	2200	x2529
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1008
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1192
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2062
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1662
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x670
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3221
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3756
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1028
1656D	K-good constructive algorithms, math, number theory	1900	x6695
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2801
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5168
1646E	Power Board brute force, dp, math, number theory	2200	x2318
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6079
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x4510
1627D	Not Adding brute force, dp, math, number theory	1900	x7932
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2625
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1358
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1002
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1992
1593D2	Half of Same brute force, math, number theory	1900	x4858
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2173
1575G	GCD Festival math, number theory	2200	x653
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2232
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4671
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1435
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9438
1510D	Digits dp, math, number theory	2100	x1807
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2005
1499D	The Number of Pairs dp, math, number theory	2100	x5550
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1573
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4788
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4966
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5719
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6519
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6207
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1274
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3157
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8912
1389E	Calendar Ambiguity math, number theory	2200	x3125
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2308
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x4980
1366D	Two Divisors constructive algorithms, math, number theory	2000	x10072
1359E	Modular Stability combinatorics, math, number theory	2000	x5836
1346G	Two IP Cameras *special problem, math, number theory	2300	x133
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2649
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3991
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3087
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2343
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x2535
1295D	Same GCDs math, number theory	1800	x8611
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x3089
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x4559
1244C	The Football Season brute force, math, number theory	2000	x7454
1225D	Power Products hashing, math, number theory	1800	x7618
1220D	Alex and Julian bitmasks, math, number theory	1900	x3844
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3215
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1605

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