#include <bits/stdc++.h>
using namespace std;
int main() {
  int l, r, a, b, k;
  scanf("%d%d%d%d%d", &l, &r, &a, &b, &k);
  for (int i = a; i <= b; ++i)
    if (l <= 1LL * i * k && 1LL * i * k <= r) {
      printf("YES\n");
      return 0;
    }
  printf("NO\n");
  return 0;
}
