#include <bits/stdc++.h>
#include <atcoder/dsu>
using namespace std;

#define rep(i,a) for(int i=0;i<a;i++)
#define f(i,a,b) for(int i=a;i<=b;i++)
#define rf(i,a,b) for(int i=a;i>=b;i--)

using ll = long long;
using ld = long double;
using vi= vector<int>;
using vvi= vector<vi>;
using vs= vector<string>;
using pii= pair<int, int>;
using vpii= vector<pii>;
#define endl '\n'

int main(void){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
	ll n;
	cin >> n;
	cout << n * n << endl;
}