#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 m=0,n,n1; cin>>n; n1=n; while(n1!=0){ m=m*10+n1%10; n1/=10; } if(m==n){ cout<<"YES"; } else{ cout<<"NO"; } return 0; }