#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    int isNegative=0;
    if(n<0)
    {
        isNegative=1;
        n=-n;
    }
}
char str[20];
sprintf(str,"%d",n);
for)(int i=0;str[i] !='\0';i++)
{
    if(str[i]=='0')
    {
        str[i]='1';
    }
}
int result;
sscanf(str,"%d",&result);
if(isNegative)
{
    result=-result;
}
printf("%d\n",result);
return 0;