#include <stdio.h>

int ft_is_prime(int nb)
{
    int i = 2;
    while (i < nb / 2)
    {
        if (nb % i == 0)
            return (0);
        i++;
    }
    return (1);
}
int main() {
    printf("%d\n", ft_is_prime(9));
    return 0;
}

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