#include <bits/stdc++.h>
using namespace std;

long long power(long long a,long long b)
{
     if(b==0)
     return 1;
     long long temp = power(a,b/2);
     if(b%2==0)
     return temp*temp;
     else
     return a*temp*temp;
}
int main()
{
    long long a,b;
    cin>>a>>b;
    long long ans1 = power(a,b);
    long long ans2  =power(b,a);
    if(ans1==ans2)
    cout<<"YES"<<endl;
    else
    cout<<"No"<<endl;

    return 0;
}