#include <iostream>
#include <cmath>
//sourcea.ir
int main() {
    int num;
    
    std::cout << "Enter a number: ";
    std::cin >> num;
    
    double squareRoot = sqrt(num);
    
    if (squareRoot == int(squareRoot)) {
        std::cout << num << " is a perfect square." << std::endl;
    } else {
        std::cout << num << " is not a perfect square." << std::endl;
    }
    
    return 0;
}