UVA 10127 - Ones(数论)

UVA 10127 - Ones

#include <stdio.h>
#include <string.h>

int n;

int main() {
while (~scanf("%d", &n)) {
int ans = 1;
int now = 1;
while (now) {
now = (now * 10 + 1) % n;
ans++;
}
printf("%d\n", ans);
}
return 0;
}