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