#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;
}