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