UVA 913 - Joana and the Odd Numbers(C++ file)

Problem Type : Ad hoc


#include<stdio.h>
int main()
{
    long long int n,sum;

    while(scanf("%lld",&n)==1)
    {
        sum=((n*(n+2))/2)*3-6;
        printf("%lld\n",sum);
    }
    return 0;
}