计数排序

def counting_sort(____):
    if not arr:
        return arr
    max_val = max(____)
    min_val = min(____)
    range_val = max_val - min_val + ____
    count = [____] * range_val
    for x in arr:
        count[x - min_val] += ____
    result = []
    for i, c in enumerate(____):
        result.extend(____)
    return result