#include <bits/stdc++.h>
using namespace std;
int main() {
  int l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  string a[] = {"YES", "NO"};
  for (int i = l; i <= r; ++i) {
    if (i % k != 0) continue;
    int ret = i / k;
    if (ret == 0) continue;
    if (i / ret == k) {
      if (ret >= x && ret <= y) {
        cout << a[0] << '\n';
        return 0;
      }
    }
  }
  cout << a[1] << '\n';
}
