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Problems

Complexity
All Problems Very simple Simple Average Difficult Very difficult
Simple mathematics
All Problems Combinatorics Comforting task Game theory Graph theory Long arithmetic Modeling Number theory Probability Simple mathematics Test problem Others...
1
Simple problem
36922 / 41384
3
Match’s model
2695 / 12891
58
The Billiards
879 / 1193
63
Anfisa and the flowers
4962 / 5999
67
Cheese for Anfisa - 2
3087 / 3494
109
Page numbering
2733 / 3810
111
Clocks
1222 / 1886
116
Long number (RU)
572 / 985
117
Raft
1007 / 1247
119
Degree of two
1592 / 2128
127
Dollars in bank
1958 / 2675
132
Broken line (RU)
77 / 241
133
Square and points (RU)
5106 / 5703
140
Financial pyramid (RU)
720 / 951
186
Egyptian symbols
521 / 699
219
Central heating
3343 / 4039
255
License Software
1835 / 2288
273
Modular Exponentiation
2908 / 3790
583
Airplane (RU)
137 / 462
933
The sum of digits of a two-digit number
6441 / 7908
935
Decomposition of three digit number
8121 / 9323
936
Cramer's Formula
1621 / 2047
937
Product of Array Except Self
3562 / 4707
942
Diagonals
2711 / 2958
1005
Matches for children are not toys!
740 / 955