#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int i=0,a,k=0,n; cin>>a; n=a; while(a!=0){ k*=10; k+=a%10; a/=10; } if(k==n){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }