#include <iostream>
using namespace std;
int main() {
int n,k,s=0,l=0;
cin >> n >> k;
while(n>=k ){
n=n-k;
s++;
if(n>=k){
n=n-k;
l++;
}
}
if(s>l){
cout << "yes";
}
else cout << "No";
}
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