#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int t=n;
    int y=0;
    while(n!=0)
    {
        int ge=n%10;
        y*=10;
        y+=ge;
        n/=10;
    }
    if(y==t)
    {
        cout<<"YES";
    }
    else
    {
        cout<<"NO";
    }
    return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int t=n; int y=0; while(n!=0) { int ge=n%10; y*=10; y+=ge; n/=10; } if(y==t) { cout<<"YES"; } else { cout<<"NO"; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int t=n; int y=0; while(n!=0) { int ge=n%10; y*=10; y+=ge; n/=10; } if(y==t) { cout<<"YES"; } else { cout<<"NO"; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int t=n; int y=0; while(n!=0) { int ge=n%10; y*=10; y+=ge; n/=10; } if(y==t) { cout<<"YES"; } else { cout<<"NO"; } return 0; }

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int t=n;
    int y=0;
    while(n!=0)
    {
    	int a=n%10;
        y*=10;
        y+=a;
        n/=10;
	}
	if(y==t)
	{
		cout<<"YES";
	}
	else
	{
		cout<<"NO";
	}
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int t=n;
    int y=0;
    while(n!=0)
    {
        int ge=n%10;
        y*=10;
        y+=ge;
        n/=10;
    }
    if(y==t)
    {
        cout<<"YES";
    }
    else
    {
        cout<<"NO";
    }
    return 0;
}