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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;
const ll INF = 1e18;
const ll MOD = 998244353;
const ll MODD = 1e9 + 7;
long long modpow(long long x, long long n);
long long modinv(long long a, long long m);
bool palindrome(const string& s);

int main(){
	ll x = 0;
	cin >> x;
	cout << x*x << endl;
}

long long modpow(long long x, long long n) {
    long long ret = 1;
    while (n > 0) {
        if (n & 1) ret = ret * x % MOD;
        x = x * x % MOD;
        n >>= 1;
    }
    return ret;
}

long long modinv(long long a, long long m){
	long long b = m, u = 1, v = 0;
	while (b) {
		long long t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= m;
	if (u < 0) u += m;
	return u;
}

bool palindrome(const string& s){
    return equal(s.begin(), s.end(), s.rbegin());
}