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