6177번 - Statistics 스페셜 저지다국어

The cows have enrolled in elementary statistics and are having a tough time with their homework. Please help them.

Given a set of N (1 <= N <= 500) numbers, X_i (-5,000 <= X_i <= 5000), calculate two statistics:

• The mean (sum of the numbers divided by N)
• The median (if N is odd, the middle number when the N numbers are sorted; if N is even, the mean of the two middle numbers when the N numbers are sorted)

Your answer will be considered correct if it is within 0.002 of the official answer.

• Line 1: A single integer: N
• Lines 2..N+1: Line i+1 contains a single integer: X_i

• Line 1: The mean of the input set
• Line 2: The median of the input set

(12+4+6+8+2)/5=6.4

Middle number of the set {2, 4, 6, 8, 12} is 6