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