#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  for (long long int i = x; i <= y; ++i) {
    if (k * i >= l && k * i <= r) {
      cout << "YES" << endl;
      exit(0);
    }
  }
  cout << "NO" << endl;
}
