#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 n=0,num,a,r=0; cin>>num; n=num; while(n!=0){ a=n%10; r=r*10+a; n=n/10; } if(r==num) cout<<"YES"<<endl; else cout<<"NO"<<endl; return 0; }