#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,b=0,c=0,d; cin>>a; b=a; while(b!=0){ d=b%10; c=c*10+d; b=b/10; } if(c==a) cout<<"YES"<<endl; else cout<<"NO"<<endl; return 0; }