ABC387 - A

https://atcoder.jp/contests/abc387/tasks/abc387_a
按题意模拟即可

$$ans=(a+b)^2$$

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a,b;
    cin >> a >> b;
    cout << (a+b)*(a+b) << endl;
    return 0;
}