#include <iostream>
#include <cmath>
#include <boost/cast.hpp>
#include <boost/integer.hpp>

using namespace std;
int main() {
	try {
		cout << boost::numeric_cast<int64_t>((float)ldexp(-1,63));
	} catch(boost::bad_numeric_cast &e) {
		cout << e.what();
	}
}