# ---
# title: 1619. Mean of Array After Removing Some Elements
# id: problem1619
# author: Tian Jun
# date: 2020-10-31
# difficulty: Easy
# categories: Array
# link: <https://leetcode.com/problems/mean-of-array-after-removing-some-elements/description/>
# hidden: true
# ---
# 
# Given an integer array `arr`, return _the mean of the remaining integers after
# removing the smallest`5%` and the largest `5%` of the elements._
# 
# Answers within `10-5` of the **actual answer** will be considered accepted.
# 
# 
# 
# **Example 1:**
# 
#     
#     
#     Input: arr = [1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3]
#     Output: 2.00000
#     Explanation: After erasing the minimum and the maximum values of this array, all elements are equal to 2, so the mean is 2.
#     
# 
# **Example 2:**
# 
#     
#     
#     Input: arr = [6,2,7,5,1,2,0,3,10,2,5,0,5,5,0,8,7,6,8,0]
#     Output: 4.00000
#     
# 
# **Example 3:**
# 
#     
#     
#     Input: arr = [6,0,7,0,7,5,7,8,3,4,0,7,8,1,6,8,1,1,2,4,8,1,9,5,4,3,8,5,10,8,6,6,1,0,6,10,8,2,3,4]
#     Output: 4.77778
#     
# 
# **Example 4:**
# 
#     
#     
#     Input: arr = [9,7,8,7,7,8,4,4,6,8,8,7,6,8,8,9,2,6,0,0,1,10,8,6,3,3,5,1,10,9,0,7,10,0,10,4,1,10,6,9,3,6,0,0,2,7,0,6,7,2,9,7,7,3,0,1,6,1,10,3]
#     Output: 5.27778
#     
# 
# **Example 5:**
# 
#     
#     
#     Input: arr = [4,8,4,10,0,7,1,3,7,8,8,3,4,1,6,2,1,1,8,0,9,8,0,3,9,10,3,10,1,10,7,3,2,1,4,9,10,7,6,4,0,8,5,1,2,1,6,2,5,0,7,10,9,10,3,7,10,5,8,5,7,6,7,6,10,9,5,10,5,5,7,2,10,7,7,8,2,0,1,1]
#     Output: 5.29167
#     
# 
# 
# 
# **Constraints:**
# 
#   * `20 <= arr.length <= 1000`
#   * `arr.length` ******is a multiple** of `20`.
#   * `0 <= arr[i] <= 105`
# 
# 
## @lc code=start
using LeetCode

## add your code here:
## @lc code=end
