Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
09:28:06
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
09:28:06
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1920B	Summation Game games, greedy, math, sortings	1100	x19119
1920A	Satisfying Constraints brute force, greedy, math	800	x26367
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x762
1919A	Wallet Exchange games, math	800	x31573
1918G	Permutation of Given constructive algorithms, math	2700	x417
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12417
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28603
1917E	Construct Matrix constructive algorithms, math	2500	x1258
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1643
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9318
1917A	Least Product constructive algorithms, math	800	x24071
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x499
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x581
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x7837
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x16566
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23471
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24438
1915E	Romantic Glasses data structures, greedy, math	1300	x18240
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1656
1914C	Quests greedy, math	1100	x20528
1914B	Preparing for the Contest constructive algorithms, math	800	x28394
1912I	Innovative Washing Machine geometry, math, two pointers	3300	x54
1912F	Fugitive Frenzy math, probabilities	3100	x104
1912E	Evaluate It and Back Again constructive algorithms, implementation, math	2200	x764
1912D	Divisibility Test math	1900	x1291
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x909
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x73
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x819
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1619
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1234
1909D	Split Plus K greedy, math, number theory	1900	x3942
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x9874
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13684
1909A	Distinct Buttons implementation, math	800	x15663
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18238
1906M	Triangle Construction greedy, math	1700	x2292
1906K	Deck-Building Game divide and conquer, math	2500	x262
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x840
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3459
1905A	Constructive Problems constructive algorithms, math	800	x21703
1903E	Geo Game greedy, interactive, math	2000	x1780
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x887
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12141
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6092
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x10602
1901B	Chip and Ribbon greedy, math	1100	x13918
1901A	Line Trip greedy, math	800	x24789
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3667
1900B	Laura and Operations dp, math	900	x15881
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12106
1899A	Game with Integers games, math, number theory	800	x37296
1898D	Absolute Beauty greedy, math	1900	x4689
1898B	Milena and Admirer greedy, math	1500	x10396
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
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x642
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5138
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x622
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5531
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10036
1895B	Points and Minimum Distance greedy, math, sortings	800	x19584
1895A	Treasure Chest math	800	x23330
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x769
1891D	Suspicious logarithms binary search, brute force, math	1900	x3683
1891B	Deja Vu brute force, math, sortings	1100	x15612
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x6696
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x802
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1320
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3307
1886B	Fear of the Dark binary search, geometry, math	1200	x15076
1886A	Sum of Three brute force, constructive algorithms, math	800	x24433
1884E	Hard Design greedy, implementation, math	2800	x258
1884D	Counting Rhyme dp, math, number theory	2100	x2781
1884B	Haunted House binary search, greedy, math, two pointers	1100	x11612
1884A	Simple Design brute force, greedy, math	800	x16390
1883C	Raspberries dp, math	1000	x22406
1883A	Morning math	800	x23707
1881D	Divide and Equalize math, number theory	1300	x14227
1881B	Three Threadlets math	900	x23497
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6523
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3684
1878C	Vasilije in Cacak math	900	x28136
1878B	Aleksa and Stack constructive algorithms, math	800	x29712
1877C	Joyboard math, number theory	1200	x9995
1877A	Goals of Victory math	800	x18478
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10732
1874E	Jellyfish and Hack dp, math	3000	x266
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x643
1874C	Jellyfish and EVA dp, graphs, greedy, math, probabilities	2300	x1493
1873F	Money Trees binary search, greedy, math, two pointers	1300	x13695
1873C	Target Practice implementation, math	800	x34872
1873B	Good Kid brute force, greedy, math	800	x43861
1872G	Replace With Product brute force, greedy, math	2000	x3945
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5752
1872D	Plus Minus Permutation math	1200	x20762
1872C	Non-coprime Split math, number theory	1100	x21845
1872A	Two Vessels brute force, greedy, math	800	x37126
1870F	Lazy Numbers binary search, math	2900	x462
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x10680
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13285