> #include <stdio.h>
> #include <string.h>
> char b[105];
> int a[105],i,j,n;
> int main() {
> while (scanf("%s", b)&& strcmp(b, "0")&&(n = strlen(b))) 	 
> 	for (i = 0;i<n;i++)
> 	 a[i] += b[n - 1 - i] - '0';
> for (i = 0; i < 104; i++)
>  if (a[i]>9)   a[i + 1] += a[i] / 10, a[i] %= 10;
>     while (!a[--i]);
> 	while (i >= 0) printf("%d", a[i--]);
> 	puts("\n");
> }