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