UVA-12149 FeynMan

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long int n,s;
    while(cin>>n)
    {
        if(n==0)
        {
            break;
        }
        else
        {
            s=((n*(n+1)*(2*n+1))/6);  // 1^2+2^2+3^2+..........n^2= (n*(n+1)*(2*n+1))/6 [Rule]
            cout<<s<<endl;
        }
    }
    return 0;
}

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About Ashadullah Shawon

I am Ashadullah Shawon. I am a Software Engineer. I studied Computer Science and Engineering (CSE) at RUET. I Like To Share Knowledge. Learn More: Click Here