#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
int main() {
  long long l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  for (long long i = x; i <= y; i++)
    if (k * i >= l && k * i <= r) {
      cout << "YES" << endl;
      return 0;
    }
  cout << "NO" << endl;
  return 0;
}
