Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
13:59:55
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
13:59:54
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
630E	A rectangle math	1900	x2124
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2105
724C	Ray Tracing greedy, hashing, implementation, math, number theory, sortings	1800	x2104
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2103
776E	The Holmes Children math, number theory	2100	x2098
1100F	Ivan and Burgers data structures, divide and conquer, greedy, math	2500	x2097
316A2	Special Task math	1400	x2097
1553F	Pairwise Modulo data structures, math	2300	x2095
553B	Kyoya and Permutation binary search, combinatorics, constructive algorithms, greedy, implementation, math	1900	x2094
167B	Wizards and Huge Prize dp, math, probabilities	1800	x2086
222C	Reducing Fractions implementation, math, number theory, sortings	1800	x2078
488B	Candy Boxes brute force, constructive algorithms, math	1900	x2076
402E	Strictly Positive Matrix graphs, math	2200	x2075
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2074
490D	Chocolate brute force, dfs and similar, math, meet-in-the-middle, number theory	1900	x2069
1158B	The minimal unique substring constructive algorithms, math, strings	2200	x2062
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2059
18B	Platforms brute force, math	1700	x2059
965C	Greedy Arkady math	2000	x2053
32C	Flea math	1700	x2049
696C	PLEASE combinatorics, dp, implementation, math, matrices	2000	x2046
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	3000	x2044
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2043
1166D	Cute Sequences binary search, brute force, greedy, math	2200	x2042
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2036
305B	Continued Fractions brute force, implementation, math	1700	x2032
958D1	Hyperspace Jump (easy) expression parsing, math	1400	x2030
1270G	Subset with Zero Sum constructive algorithms, dfs and similar, graphs, math	2700	x2029
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2016
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2016
486E	LIS of Sequence data structures, dp, greedy, hashing, math	2200	x2015
167A	Wizards and Trolleybuses implementation, math	1600	x2011
571A	Lengthening Sticks combinatorics, implementation, math	2100	x2006
238A	Not Wool Sequences constructive algorithms, math	1300	x2004
601B	Lipshitz Sequence data structures, math	2100	x2001
1619F	Let's Play the Hat? brute force, constructive algorithms, greedy, math	2000	x1999
76D	Plus and xor dp, greedy, math	1700	x1989
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x1988
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x1984
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1983
1348E	Phoenix and Berries brute force, dp, greedy, math	2400	x1979
1139D	Steps to One dp, math, number theory, probabilities	2300	x1974
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1971
117A	Elevator implementation, math	1300	x1971
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x1969
906D	Power Tower chinese remainder theorem, math, number theory	2700	x1965
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x1963
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1959
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1952
364D	Ghd brute force, math, probabilities	2900	x1950
1179C	Serge and Dining Room binary search, data structures, graph matchings, greedy, implementation, math, trees	2200	x1946
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1945
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x1940
1392F	Omkar and Landslide binary search, constructive algorithms, data structures, greedy, math	2400	x1939
1346A	Color Revolution *special problem, math	1000	x1939
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1939
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2400	x1937
255D	Mr. Bender and Square binary search, implementation, math	1800	x1929
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x1928
1795E	Explosions? binary search, data structures, dp, greedy, math	2200	x1907
134B	Pairs of Numbers brute force, dfs and similar, math, number theory	1900	x1906
1413E	Solo mid Oracle greedy, math, ternary search	2100	x1905
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1900
1089F	Fractions math	1900	x1897
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x1896
1769A	Узкая дорога *special problem, math	800	x1894
356B	Xenia and Hamming implementation, math	1900	x1886
145C	Lucky Subsequence combinatorics, dp, math	2100	x1881
1841E	Fill the Matrix data structures, greedy, math	2200	x1873
933B	A Determined Cleanup math	2000	x1873
975D	Ghosts geometry, math	2000	x1867
1027E	Inverse Coloring combinatorics, dp, math	2100	x1858
1055C	Lucky Days math, number theory	1900	x1840
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1822
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1819
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1808
603C	Lieges of Legendre games, math	2200	x1807
1510D	Digits dp, math, number theory	2100	x1792
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1792
24D	Broken robot dp, math, probabilities	2400	x1786
549H	Degenerate Matrix binary search, math	2100	x1785
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1784
65A	Harry Potter and Three Spells implementation, math	1800	x1781
1252K	Addition Robot data structures, math, matrices	2100	x1780
1903E	Geo Game greedy, interactive, math	2000	x1779
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1779
1768E	Partial Sorting combinatorics, math, number theory	2300	x1768
509E	Pretty Song math, strings	2000	x1768
1183F	Topforces Strikes Back brute force, math, sortings	2100	x1763
258C	Little Elephant and LCM binary search, combinatorics, dp, math	2000	x1754
1267K	Key Storage combinatorics, math	2100	x1737
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1734
910C	Minimum Sum constructive algorithms, greedy, math	1700	x1731
995C	Leaving the Bar brute force, data structures, geometry, greedy, math, sortings	2300	x1726
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1722
75D	Big Maximum Sum data structures, dp, greedy, implementation, math, trees	2000	x1715
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1710
746E	Numbers Exchange greedy, implementation, math	1900	x1709
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1704
1468H	K and Medians constructive algorithms, greedy, math	2200	x1702