function superfactorialZeros(N) {
    var result = 0;
    for (i = 1; i <= N; i++) {
        result += zeroes(i);
    }

    return result;
}

function zeroes(n) {
    var i = 1;
    var result = 0;
    while (n >= i) {
        i *= 5;
        result += Math.floor(n / i);
    }
    return result;
}

function superfactorialZeros(N) {
    R = 0

    for (; N ; N--)
        for (j = 5; N >= j; j *= 5) 
            R += N / j | 0
        
    return R
}