1227825Stheraven1 3 2227825Stheraven# n 1 3227825Stheraven1 1 -1 # n >= 1 4353358Sdim-1 5353358Sdim 6353358Sdim2 4 7227825Stheraven# i n 1 8227825Stheraven1 1 0 1 # i >= -1 9227825Stheraven1 -1 1 0 # i <= n 10227825Stheraven