#include <bits/stdc++.h>
using namespace std;
int main() {
  int l, r, x, y;
  double k;
  cin >> l >> r >> x >> y >> k;
  bool flag = false;
  double value;
  while (x <= y) {
    value = (double)x * k;
    if (value >= l && value <= r) {
      flag = true;
      break;
    }
    x++;
  }
  if (flag) {
    cout << "YES";
  } else {
    cout << "NO";
  }
  return 0;
}
