16
530, 100, 6
490, 70, 7
160, 70, 0
150, 80, 1
150, 100, 2
240, 220, 3
240, 280, 2
220, 300, 1
160, 300, 0
50, 410, 1
50, 520, 2
90, 550, 3
270, 550, 4
350, 470, 5
500, 470, 4
530, 440, 5