#include <charconv>

#include <iostream>

#include <cstring>

using namespace std;

int main(int argc, char **argv)

{

	size_t r=0;

	const char *begin = argv[1];

	const char *end = begin + strlen(begin);

	from_chars(begin, end, r);

	cout << r << '\n';

	return 0;

}