#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int L, R, X, Y, K;
  cin >> L >> R >> X >> Y >> K;
  if (K * Y < L || K * X > R || (L / K == R / K && L % K != 0))
    cout << "NO" << endl;
  else
    cout << "YES" << endl;
}
