Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.

But I also don't want to use many numbers, so I'll choose three positive integers (they don't have to be distinct) which are not greater thann. Can you help me to find the maximum possible least common multiple of these three integers?

The first line contains an integer?n?(1?≤?n?≤?10^6) — the?n?mentioned in the statement.

Print a single integer — the maximum possible LCM of three not necessarily distinct positive integers that are not greater than?n.

        9
      

        504
      

        僅僅要這三個數中有兩個數是奇數一個是偶數，最小公倍數就是這三個數的積。
      

        
          #include<stdio.h>
int main()
{
    long long  LCM,n;
    while(scanf("%lld",&n)>0)
    {
        if(n==1)LCM=1;
        if(n==2)LCM=2;
        if(n>2)
        {
            if(n%2)LCM=n*(n-1)*(n-2);
            else
            {
                if(n*(n-1)*(n-2)/2<n*(n-1)*(n-3))
                    LCM=n*(n-1)*(n-3);
                else LCM=n*(n-1)*(n-2)/2;
            }
        }
        printf("%lld\n",LCM);
    }
}