自己看

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
string s;
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	std::cout.tie(nullptr);
	cin>>s;
    string t=s;
    reverse(t.begin(),t.end());
    if(s==t){
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }
	//fclose(stdin);
	//fclose(stdout);
	return 0;
}
//coder::by::M91