//1414 31回文字符串 #include<iostream> #include<cstdio> #include<cstring> #include<cmath> using namespace std; int main(){ string n; int a,l,s; cin>>n; l=n.length(); for(int i=0;i<l;i++){ if(n[i]!=n[l-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }