4796 캠핑

#include <stdio.h>
 
int upper[100] = { 0 };
int down[100] = { 0 };
 
int main() {    
    int idx = 1;
    while (1) {
        int n, a, b;
        scanf("%d %d %d", &n, &a, &b);
        if (n == 0) return 0;
 
        int rst=0;
        if ((b%a) > n) {
            rst = (b / a)*n + n;
        }else{
            rst = (b / a)*n + (b%a);
        }
        printf("Case %d: %d\n", idx,rst);
        idx++;
    }    
}