#include<iostream> using namespace std; int main() { int n,g=0,s=0,b=0,z=0; cin>>n; for(int i=0;i<=n;i++) { if(i%2==1) g++; } b=n+1-1-1;//n-1 s=n+1-1-1; z=b*s*g; cout<<z; return 0; }