Source Code

Problem: 1565  User: birdman 
Memory: 72K  Time: 0MS 
Language: C  Result: Accepted 

Source Code 
#include<stdio.h>
#include<string.h>

int main()
{
	char a[100];
	long i,sum,m;
	while(scanf("%s",a),a[0]!='0')
	{
		m=strlen(a);
		for(i=sum=0;a[i];i++)
			sum+=((a[i]-'0')<<(m-i))-(a[i]-'0');
		printf("%ld\n",sum);
	}
	return 0;
}