4981：Goffi and Median

A median in a sequence with the length of \(n\) is an element which occupies position number \(\Large\lfloor \frac{n + 1}{2} \rfloor\) after we sort the elements in the non-decreasing order (the elements are numbered starting with 1). A median of an array (2, 6, 1, 2, 3) is the number 2, and a median of array (0, 96, 17, 23) — the number 17.

An average of a sequence is the sum of sequence divided the size of the sequence.

Goffi likes median very much and he hates average number. So if a sequence's average number is larger than or equal to the median of sequence, Goffi will hate the sequence. Otherwise, Goffi will like it.

Now, your are given a sequence. Please find whether Goffi will like it or hate it.

Input contains multiple test cases (less than 100). For each test case, the first line contains an integer \(n\) (\(1 \le n \le 1000\)), indicating the size of the sequence. Then in the next line, there are \(n\) integers \(a_1, a_2, \dots, a_n\) (\(1 \le a_i \le 1000\)), seperated by one space.

For each case, if Goffi like the sequence, output "YES" in a line. Otherwise, output "NO".