#include<iostream> #include<cstdio> #include<cstring> #include<cmath> using namespace std; int main(){ char a[1000]; int i=0,cd=0; cin>>a; while(a[i]!='\0'){ cd++; i++; } for(i=0;i<cd/2;i++){ if(a[i]!=a[cd-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }