1
1
1
[-1,0]
[-1]
[]
[5,4,3,2,1]
[5,4,3,2,1,0]
[1]
[-5,-4,-3,-2,-1,0,1,2,3,4]
[-4,-3,-2,-1,0,1,2,3,4,5]
[-3,-2,-1,0,1,2,3,4,5,6]
[-2,-1,0,1,2,3,4,5,6,7]
[-1,0,1,2,3,4,5,6,7,8]
[0,1,2,3,4,5,6,7,8,9]
[1,2,3,4,5,6,7,8,9,10]
[2,3,4,5,6,7,8,9,10,11]
[3,4,5,6,7,8,9,10,11,12]
[4,5,6,7,8,9,10,11,12,13]