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