What's wrong with it? I tried every test in previous topics and everything is fine, but Timus system does not accept my program.

#include <stdio.h>

int fact(int n, int k){
    int res = 1;
    if (n == 0)
        return res;
    while (n > k) {
         res *= n;
         n -= k;
    }
    if (n % k)
        res *= (n % k);
    else
        res *= k;
    return res;
}

int main () {
    char sym;
    int n = 0;
    int symCount = 0;
    scanf("%d ", &n);
    while (scanf("%1[!]", &sym) == 1) {
            symCount++;
    }
    printf("%d\n", fact(n, symCount));
    return 0;
}