#include <iostream>
#include <string>
#include <math.h>

using namespace std;

void bin_to_dec(string s)
{
	int res = 0;
	int len = s.length();
	int *arr = new int[len];


	for (int i = 0; i < len; i++)
	{
		if (s[i] == '1')
		{
			arr[i] = 1;

		}

		if (s[i] == '0')
		{
			arr[i] = 0;
		}
	}


	for (int i = 0, j = len - 1; i < len, j >= 0; i++, j--)
		res = res + arr[i] * (int)pow(2, j);

	cout << "in dec " << res << endl;

}

int main()

{
	string s = "";

	while (true)
	{
		cin >> s;
		bin_to_dec(s);
	}

	system("pause");
	return 0;

}