#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <math.h>
#include <vector>
#include <queue>
#include <algorithm>
#include <sstream>
#include <string>
#include <map>
#include <math.h>
#include <time.h>

using namespace std;

#define FOR(I,N) for(int I = 0; I < (int)(N); I++)
#define FIN(V) cout<<V<<endl
#define pb push_back
#define INF (1 << 30)
#define ll long long

typedef pair<int, int> P;

string sValueOf(int v){stringstream ss;ss<<v;return ss.str();}
int parseInt(string v){int i;stringstream ss(v);ss>>i;return i;}
void fast_io() {cin.tie(0); ios::sync_with_stdio(false);}

int main(){
	int i,j;
	ll X,next;
	ll Y = 1;
	cin>>X;
	while(true){
		next = X*Y;
		double Z = sqrt(next);
		double ki = (double)((ll)Z);
		if(Z==ki)break;
		Y++;
	}
	///cout<<clock()-s<<endl;
	cout<<Y<<endl;
	return 0;
}