#include <bits/stdc++.h>
using namespace std;
const int MAX = 100005;
const int sqr = 320;
const int oo = 1e9 + 7;
const long long mod = 1e9 + 7;
const double eps = 1e-16;
long long l, r, x, y, k;
int main() {
  cin.sync_with_stdio(false);
  cin.tie(0);
  cin >> l >> r >> x >> y >> k;
  for (long long i = x; i <= y; i++) {
    if (i * k >= l && i * k <= r) {
      cout << "YES" << endl;
      return 0;
    }
  }
  cout << "NO" << endl;
}
