why my second case isn't executed? for(int a0 = 0; a0 < t; a0++){ int n; cin >> n; int sum=0; int sqsum=0; int sqaure;

    for(int i=1;i<=n;i++){
         sum+=i;
         sqaure =pow(sum,2);
         sqsum+=pow(i,2);
    }
    int diff=sqaure-sqsum;
     cout<<diff<<endl;
}