#include<stdio.h>
int main()
{
    int a,b[10],i,c=0,m,n,s,f;
    scanf("%d",&a);
    i=0;
    while(a!=0)
    {
        b[i]=a%10;
        a=a/10;
        i=i+1;
    }
    f=0;
    for (s=0;s<i;s++)
     if (b[s]==0)
     f=f+1;
     else break;
     n=i/2;
     for (m=f;m<=n;m++)
     if(b[m]==b[i-1])
     i--;
     else 
        {
        printf("%s","no");
        break;
    }
    if (m==n+1)
    printf("%s","yes");g
        return 0;
}