[1,0,1,0,1,0,1,1,1,1,1,2,1,2,2,2,2,2,3,2,3,3,4,3, 4,4,4,4,5,5,5,5,6,6,6,7,7,7,7,8,8,8,9,9,10,9,11, 10,11,11,12,12,12,13,13,14,14,15,15,15,16,16,17, 17,18,18,19,19,20]