#include <iostream>
#include <iomanip>
#include <cmath>
#include <limits>
int main() {
std::cout << std::boolalpha << std::numeric_limits<double>::is_iec559 << std::endl;
unsigned int input;
std::cin >> input;
std::cout << std::setprecision(32) << std::fixed << std::sqrt(input) << std::endl;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8aW9tYW5pcD4KI2luY2x1ZGUgPGNtYXRoPgojaW5jbHVkZSA8bGltaXRzPgoKaW50IG1haW4oKSB7CiAgc3RkOjpjb3V0IDw8IHN0ZDo6Ym9vbGFscGhhIDw8IHN0ZDo6bnVtZXJpY19saW1pdHM8ZG91YmxlPjo6aXNfaWVjNTU5IDw8IHN0ZDo6ZW5kbDsKICAKICB1bnNpZ25lZCBpbnQgaW5wdXQ7CiAgc3RkOjpjaW4gPj4gaW5wdXQ7CiAgCiAgc3RkOjpjb3V0IDw8IHN0ZDo6c2V0cHJlY2lzaW9uKDMyKSA8PCBzdGQ6OmZpeGVkIDw8IHN0ZDo6c3FydChpbnB1dCkgPDwgc3RkOjplbmRsOwp9