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