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