#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;

int main()
{
	ll X;
	cin >> X;

	for (ll i = 1; i <= sqrt(X); i++) {
		double num = X * i;
		double sq = sqrt(num);
		ll sq_i = sqrt(num);
		if (sq == (double)sq_i) {
			cout << i << endl;
			return 0;
		}
	}
	cout << X << endl;
	return 0;
}