Problem 1057 --A math problem1057: A math problem
Time Limit: 1 Sec Memory Limit: 128 MB
Submit: 84 Solved: 39
[Submit][Status][Web Board]Description
F(x)
= 5x11+11x5+kax, with (0 <= k <= 10000, 0 <= a).
Now give you k, please find the smallest a such that for any positive integer
x, F(x) % 55 = 0.
Input
Only
one line with an integer k.
Output
If
no such a exists, print -1, otherwise print the value of a.
Sample Input
3
Sample Output
13
HINT
Source
[Submit][Status]