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