/*
 * Copyright (c) JoinQuant Development Team
 * Author: Huayong Kuang <kuanghuayong@joinquant.com>
 */

#include <iostream>

using namespace std;



int main(void)
{
 int64_t a = 20211020104559998;
 int64_t b = 1000;
 int64_t c;
 c = a / b;
 cout << c << endl;

 cout << fixed;
 double a2 = (double) a;
 cout << a2 << endl;
 double c2 = a2 / b;
 cout << c2 << endl;
 cout << atoi("123.456") << endl;

 return 0;
}