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