笔记

#include <cstdio>

int main()
{
    char t;
    scanf("%c", &t);

    double q[12][12];
    for (int i = 0; i < 12; i ++ )
        for (int j = 0; j < 12; j ++ )
            scanf("%lf", &q[i][j]);

    double s = 0, c = 0;
    for (int j = 0; j < 5; j ++ )
        for (int i = j + 1; i <= 10 - j; i ++ )
        {
            s += q[i][j];
            c += 1;
        }

    if (t == 'S') printf("%.1lf\n", s);
    else printf("%.1lf\n", s / c);

    return 0;
}