字符串

#include<bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
int i=0,j=s.size()-1;
while(i<j){
if(s[i]!=s[j]){
cout<<"No";
return 0;
}
i++;
j--;
}
cout<<"Yes";
return 0;
}