ACM 11586 - Train Tracks

#include <stdio.h>

char str[200];

int main()
{
    int caseNum, M, F, i;
    scanf("%d", &caseNum);
    getchar();
    while (caseNum --)
    {
        gets(str);
        M = 0, F = 0;
        for (i = 0; str[i]; i ++)
        {
            if (str[i] == 'M') M ++;
            if (str[i] == 'F') F ++;
        }
        if (M == F && M != 1 && F != 1) printf("LOOP\n");
        else printf("NO LOOP\n");  
    }
    return 0;
}

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