// MARK: - コード
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;

const ll MOD = 1000000007;
// const ll MOD = 998244353;
// using mint = modint998244353;
const int dx[8] = {0, -1, 1, 0, -1, 1, -1, 1};
const int dy[8] = {-1, 0, 0, 1, -1, -1, 1, 1};

template<class T> istream &operator>>(istream &is, vector<T> &v) { for (auto &e : v) is >> e; return is; }
template<class T> ostream &operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; }

#define reps(i, l, r) for (std::decay_t<decltype(r)> i##_right = (r), i = (l); i < i##_right; i++)
#define rep(i, n) reps(i, 0, n)

template<class T> inline bool chmax(T &a,T& b){if(a < b){a = b; return true;} else return false;}
template<class T> inline bool chmin(T &a,T& b){if(a > b){a = b; return true;} else return false;}

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

/*
MARK: - メモ



*/