#include <iostream>
#include <cassert>
#include <cctype>
using namespace std;

unsigned int get_uint(const std::string &s) {
	unsigned int r = 0U;
	for(auto c : s) {
		assert(std::isdigit(c));
		r = r * 10 + (c - '0');
	}
	return r;
}

int main() {
	cout << get_uint("5000000000") << endl;
	return 0;
}