#include <iostream>
#include <cmath>
#include <cstdio>

using namespace std;

int main()
{
    int n; cin >> n;
    cout << pow(n, 2);
    return 0;
}

#include <iostream>
using namespace std;
int main()
{
int a=3;

cin>>a;
cout <<a*a;

return 0;
}