#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  int flag = 0;
  for (long int i = x; i <= y; i++) {
    if (l <= i * k && i * k <= r) {
      flag = 1;
      break;
    }
  }
  if (flag)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  return 0;
}
