# blocks = [5,8,3,1,5,6,9,9,2,2,4]

def dump() :
    blocks[-1] = blocks[-1] -1
    blocks[0] = blocks[0] + 1

    if blocks[0] > blocks[1] or blocks[-1] < blocks[-2] :
        blocks.sort()

def find_min_max () :
    return blocks[-1] -blocks[0]
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