Problemset - Codeforces

→ Pay attention

Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1178
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1178
593D	Happy Tree Party data structures, dfs and similar, graphs, math, trees	2400	x1178
336B	Vasily the Bear and Fly math	1900	x1176
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1169
710D	Two Arithmetic Progressions math, number theory	2500	x1164
1948F	Rare Coins combinatorics, math, probabilities	2500	x1159
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1159
1799E	City Union constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math	2300	x1157
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1150
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1143
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1141
929C	Красивая команда *special problem, combinatorics, math	1700	x1141
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math		x1135
915G	Coprime Arrays math, number theory	2300	x1133
995F	Cowmpany Cowmpensation combinatorics, dp, math, trees	2700	x1124
906B	Seating of Students brute force, constructive algorithms, math	2200	x1123
898F	Restoring the Expression brute force, hashing, math	2300	x1123
1680D	Dog Walking brute force, greedy, math	2400	x1120
1307E	Cow and Treats binary search, combinatorics, dp, greedy, implementation, math	2500	x1119
40B	Repaintings math	1600	x1113
1270F	Awesome Substrings math, strings	2600	x1103
630M	Turn geometry, math	1800	x1097
542C	Idempotent functions constructive algorithms, graphs, math	2000	x1097
1733E	Conveyor constructive algorithms, dp, math	2700	x1095
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x1095
338D	GCD Table chinese remainder theorem, math, number theory	2900	x1095
123B	Squares math	1800	x1095
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1088
895D	String Mark combinatorics, math, strings	2100	x1086
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1082
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1080
204C	Little Elephant and Furik and Rubik math, probabilities	2000	x1077
1533A	Travel to Bertown *special problem, implementation, math		x1065
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1061
1641D	Two Arrays bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers	2700	x1050
1924C	Fractal Origami geometry, math, matrices	2400	x1049
1090K	Right Expansion Of The Mind math	2000	x1048
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1047
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1047
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1044
396B	On Sum of Fractions math, number theory		x1044
792E	Colored Balls greedy, math, number theory	2500	x1042
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1033
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1032
300E	Empire Strikes Back binary search, math, number theory	2300	x1027
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1023
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1022
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1019
1599H	Hidden Fortress interactive, math	2100	x1013
917D	Stranger Trees dp, math, matrices, trees	2600	x1011
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2300	x1010
195D	Analyzing Polyline geometry, math, sortings	1900	x1004
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1003
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x1000
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x998
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x998
1662L	Il Derby della Madonnina data structures, dp, math		x997
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x992
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x988
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x986
886E	Maximum Element combinatorics, dp, math	2400	x978
1091E	New Year and the Acquaintance Estimation binary search, data structures, graphs, greedy, implementation, math, sortings	2400	x977
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x976
268E	Playlist math, probabilities, sortings	2100	x976
460D	Little Victor and Set brute force, constructive algorithms, math	2300	x975
613C	Necklace constructive algorithms, math	2500	x973
1422F	Boring Queries data structures, math, number theory	2700	x971
954I	Yet Another String Matching Problem fft, math	2200	x970
615E	Hexagons binary search, implementation, math	2100	x964
392A	Blocked Points math		x964
621D	Rat Kwesh and Cheese brute force, constructive algorithms, math	2400	x963
407C	Curious Array brute force, combinatorics, implementation, math	2500	x955
1344D	Résumé Review binary search, greedy, math	2700	x951
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x949
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x940
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x938
285E	Positions in Permutations combinatorics, dp, math	2600	x938
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x937
773C	Prairie Partition binary search, constructive algorithms, greedy, math	2200	x937
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x935
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x934
1952G	Mathematician Takeover binary search, dfs and similar, math		x932
708E	Student's Camp dp, math	3100	x932
1037F	Maximum Reduction combinatorics, data structures, math	2500	x931
1842G	Tenzing and Random Operations combinatorics, dp, math, probabilities	2800	x929
1817C	Similar Polynomials combinatorics, math	2400	x928
1111D	Destroy the Colony combinatorics, dp, math	2600	x924
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x918
1473F	Strange Set flows, math	2700	x916
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x914
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x911
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x909
518E	Arthur and Questions greedy, implementation, math, ternary search	2200	x907
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x906
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x903
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x902
416D	Population Size greedy, implementation, math	2400	x902
72C	Extraordinarily Nice Numbers *special problem, math	1200	x902
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x897