import java.util.*;
import java.io.*;
public class perfectSquare {
public static void main(String args[]) throws NumberFormatException, IOException{
BufferedReader as = new BufferedReader(new InputStreamReader(System.in));
int x = Integer.parseInt(as.readLine());
boolean y = true;
//124System.out.println(x);
for(int i=0; i<=x/2; i++){
if(i*i <= x){
if(x == (i*i)){
System.out.println(x+ " is a perfect square");
y = false;
break;
}
}
}
if(y == true){
System.out.println(x+ " is not a perfect square");
}
}
}
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