1100번: 하얀 칸

#include<cstdio>
int main()
{
    char cs[8][9];
    int ans = 0;
    for (int i = 0; i < 8; scanf("%s", &cs[i++]));
    for (int i = 0, j; i < 8; ++i)
    {
        j = ((i + 2) % 2 == 0) ? 0 : 1;
        for (int k = j; k < j + 7; k += 2)
            if (cs[i][k] == 'F')
                ++ans;
    }
    printf("%d", ans);
}