#include<bits/stdc++.h>
#include <string>
using namespace std;
class rectangle {
private:
int length, width;
public:
void set(int x, int y) {
length = x;
width = y;
}
int getlength() {
return length;
}
int getwidth() {
return width;
}
int area() {
return length * width;
}
// write your code here......
string cancover(rectangle b) {
string ret;
if (this->area() >= b.area()) {
ret = "yes";
} else {
ret = "no";
}
return ret;
}
};
int main() {
int l1, w1, l2, w2;
cin >> l1 >> w1 >> l2 >> w2;
rectangle a, b;
a.set(l1, w1);
b.set(l2, w2);
cout << a.cancover(b);
return 0;
}