#include <bits/stdc++.h>
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;

const int N = 1e5;
const int INF = 1e9;
typedef long long int ll;
typedef pair<int,int> ii;


int main()
{
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

	int r;
	cin>>r;
	cout<<r*r<<"\n";

}