#include <bits/stdc++.h>
using namespace std;
const long long mod = 1000000007;
const long long inf = 1000000000009;
int main() {
  ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
  long long l{}, r{}, x{}, y{}, k{}, f{};
  cin >> l >> r >> x >> y >> k;
  for (int i = x, sz = (int)y + 1; i < sz; i++) {
    if (l <= i * k && i * k <= r) {
      f = 1;
      break;
    }
  }
  (f) ? cout << "YES"
             << "\n"
      : cout << "NO"
             << "\n";
  return 0;
}
