#include<iostream>#include <stdio.h>#include <memory.h>#include<queue>#include<math.h>using namespace std;int main(){	freopen("d:\\1.txt", "r", stdin);	string str;	while (cin >> str)	{		int length = str.length();		if(length == 1 && str[0] == ‘0‘)			return 0;		int total = 0;		for(int i = length - 1; i >= 0; i--)		{			total += (str.at(i) - ‘0‘) * (pow(2, length - i) - 1);		}		cout<<total<<endl;	}	return 0;}