#include <iostream> #include <cstdio> using namespace std; int main() { char s[1001]; cin>>s; int s1=0; while(s[s1]!='\0'){ s1++;} for (int i=0;i<s1/2;i++){ if (s[i]!=s[s1-i-1]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }