// https://c...content-available-to-author-only...s.com/group/MWSDmqGsZm/contest/219158/problem/Z
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
double n1 , n2 , n3 , n4 ;
cin>> n1 >> n2 >> n3 >> n4 ;
double res1 = n2 * log(n1) ;
double res2 = n4 * log(n3) ;
res1 > res2 ? cout<<"YES" : cout<<"NO" ;
return 0;
}
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