Solution of LIGHT OJ 1389 :: Scarecrow

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/**Bismillahir Rahmanir Rahim.**/

#include <stdio.h>
int main()
{
    int tst, k, cnt, ans, i;
    scanf("%d", &tst);
    for(k=1; k<=tst; k++)
    {
        int n;
        scanf("%d", &n);
        char field[n+1];
        scanf("%s", field);
        for(i=0, cnt=0, ans = 0; i<n; i++)
        {
            if(field[i] == '.')
            {
                ans++;
                i += 2;
            }
        }
        printf("Case %d: %d\n", k, ans);
    }
    return 0;
}