Flatten the Curve

Given an array of integers, replace every number with the mean of all numbers.

Examples

flattenCurve([1, 2, 3, 4, 5]) ➞ [3, 3, 3, 3, 3]

flattenCurve([0, 0, 0, 2, 7, 3]) ➞ [2, 2, 2, 2, 2, 2]

flattenCurve([4]) ➞ [4]

flattenCurve([]) ➞ []

Notes

• Round averages to 1 decimal point.
• Return an empty array if given an empty array (see example #4).