12555.cpp

#include <bits/stdc++.h>
using namespace std;
#define mem(x, y) memset(x, y, sizeof(x));
int main() {
    char a[10];
    int i, j = 0, flag, k, m, l, n, t;
    double sum;
    scanf("%d", &t);
    getchar();
    while (t--) {
        flag = 0;
        j++;
        gets(a);
        l = strlen(a);
        l--;
        n = 0;
        m = 0;
        i = 0;
        while (a[i] != 0) {
            if (a[i] >= '0' && a[i] <= '9') {
                if (flag == 0) {
                    m = m * 10 + a[i] - '0';
                } else {
                    n = n * 10 + a[i] - '0';
                }
            } else
                flag = 1;
            i++;
        }
        sum = 0.5 * (double)m + 0.05 * (double)n;
        printf("Case %d: %g\n", j, sum);
    }
    return 0;
}