#include <chrono>
#include <iostream>

using namespace std;

int main() {
	const auto input = 13.42;
	const auto output = chrono::system_clock::to_time_t(chrono::system_clock::time_point(chrono::duration_cast<chrono::seconds>(chrono::duration<double>(input))));
	
	cout << input << "->" << output << endl;
}