排序第3-5列，不影响第1列或第2列

def merge_sort(arr):
    if len(arr) <= 1:
        return arr

    mid = len(arr) // 2
    left_half = arr[:mid]
    right_half = arr[mid:]

    left_half = merge_sort(left_half)
    right_half = merge_sort(right_half)

    return merge(left_half, right_half)

def merge(left, right):
    result = []
    i = j = 0

    while i < len(left) and j < len(right):
        if left[i] <= right[j]:
            result.append(left[i])
            i += 1
        else:
            result.append(right[j])
            j += 1

    while i < len(left):
        result.append(left[i])
        i += 1

    while j < len(right):
        result.append(right[j])
        j += 1

    return result

# 示例使用
data = [
    [5, 3, 9, 2, 7],
    [1, 4, 6, 8, 0],
    [10, 11, 13, 12, 15]
]

# 对第3-5列进行排序
for row in data:
    row[2:5] = merge_sort(row[2:5])

# 输出排序后的结果
for row in data:
    print(row)