.backgroundr { padding: 20%; position: absolute; opacity: 0.1; max-width: 100%; max-height: 100%; background-size: cover; background-position: center 100%; }

#include <iostream>
using namespace std;

int main()
{
    int i = 10;
    int j = 20;
    int k = i + j;
    cout << "Sum = " << k;
    return 0;
}