#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  for (long long int i = x; i <= y; i++) {
    long long int eff = i * k;
    if (eff >= l && eff <= r) {
      cout << "YES";
      return 0;
    }
  }
  cout << "NO";
  return 0;
}
