#include <iostream>
#include <bits/stdc++.h>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <set>
#include <utility>

using namespace std;

typedef long long ll;

int main()
{
    ios::sync_with_stdio(0);
    int n;
    cin>>n;
    cout<<n*n<<endl;

}