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