# include<iostream> # include<cmath> using namespace std; int main() { int n,i=1; bool f=true; cin>>n; while((int)(n/pow(10.0, i))!=0) { i++; } int a=1, b=i, c, d; while(b-a>0) { c=(pow(10.0, i-a)); d=(pow(10.0, i-b)); if((n/c)%10!=(n/d)%10) { f=false; } a++; b--; } if(f) { cout<<"YES"; } else { cout<<"NO"; } return 0; }