include <stdio.h>

include <stdlib.h>

int main() {

char a[100]; 
int i,n;
for(i=0;i<100;i++)
    a[i]=0;
    gets(a);
if(a[0]=='-')
printf("-");
for(i=99;i>=0;i--)
    if(a[i]>'0')
    printf("%c",a[i]);
return 0;
//哪错了？

}