#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; cin>>a; c=a; while(c!=0){ b=b*10+c%10; c/=10; } if(b==a) cout<<"YES"; else cout<<"NO"; return 0; }