#include<iostream> using namespace std; int main (){ char a[1001]; bool falg=true; int b=0; cin>>a; while(a[b]!='\0') b++; for(int i=0;i<b/2;i++){ if(a[i]!=a[b-1-i]){ falg=false; } } if(falg){ cout<<"Yes"; } else cout<<"No"; return 0; }