翻译一道题
Given any integer 0 <= n <= 10000 not divisible by 2 or 5, some multiple of n is a number which in decimal notation is a sequence of 1's. How many digits are in the smallest such a multiple of n?
Sample Input
3
7
9901
Sample Output
3
6
12
[此贴子已经被作者于2007-4-6 18:57:37编辑过]
