#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  long long b = 0, f = 1;
  if ((k * x > r) || (k * y < l)) {
    cout << "no" << endl;
  } else {
    for (long long i = x; i <= y; i++) {
      long long E = k * i;
      for (long long j = l; j <= r; j++) {
        if (j == E) {
          cout << "yes" << endl;
          return 0;
        }
      }
    }
    cout << "no" << endl;
  }
  return 0;
}
