#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); ++i)
template<typename T> inline bool chmax(T &a, T b) { return ((a < b) ? (a = b, true) : (false)); }
template<typename T> inline bool chmin(T &a, T b) { return ((a > b) ? (a = b, true) : (false)); }
#define int long long
const int INF = (1LL << 60);
//const int MOD = 1e9 + 7;
vector<int> dx = { 0,1 };
vector<int> dy = { 1,0 };

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