#include <bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint1000000007;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define rep(i, a, n) for(int i = a; i < n; i++)
vector<pair<int,int>>dxy = {{1,0}, {0,1}, {-1, 0}, {0, -1}};
const int INF = 1e9;
const double PI = acos(-1);

int main(){
	int n;
	cin >> n;
	cout << n*n << endl;
}