[0,0,1,1,2,3,4,4,5,5,7,7,8,8,9,10,11,11,12,12,14, 14,15,15,16,17,18,18,19,19,21,21,22,22,23,24,25, 25,26,26,28,28,29,29,30,31,32,32,33,33,35,35,36, 36,37,38,39,39,40,40,42,42,43,43,44,45,46,46,47, 47,49,49,50,50]