step = 1
step_point = 100000
step = 2
step_point = 420000
step = 3
step_point = 512000
step = 4
step_point = 604000
step = 5
step_point = 696000
step = 6
step_point = 788000
step = 7
step_point = 880000
step = 8
step_point = 972000
step = 9
step_point = 1064000
step = 10
step_point = 1156000
step = 11
step_point = 1248000
step = 12
step_point = 1340000
step = 13
step_point = 20000000