number program

/*

 * bhatt.umang7@gmil.com

 */

/*

 * 2520 is the smallest number that can be divided

 * by each of the numbers from 1 to 10 without any remainder.

 * What is the smallest positive number that is evenly

 * divisible by all of the numbers from 1 to 20?

 */



#include<iostream>


using namespace std;

int main()

{

    long n1 = 100;

    int ans1 = 0;
    int ans2 = 0 ;

    int ans = 0 ;
    for(int i = 1 ; i <= n1 ; i++)
    {

        ans1 += i;
    }
    ans1 = ans1 * ans1;

    for(int i = 1 ; i <= n1 ; i++)
    {

        ans2 += (i*i);
    }
    ans = ans1 + ans2;

    cout<< "Ans is "  <<  ans1-ans2 ;

    return 0;

}