DevSkill DCP 154 Square Sum Difference





#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long int n,i,j,t,ss,sn,d;
    cin>>t;
    for(i=1;i<=t;i++)
    {
        cin>>n;
        sn=(n*(n+1))/2;
        ss=(n*(n+1)*(2*n+1))/6;
        d=abs(ss-(sn*sn));
        cout<<d<<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.
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