[0,0,1,2,3,3,4,5,5,6,7,7,8,9,10,10,11,12,12,13,14, 15,15,16,17,17,18,19,20,20,21,22,22,23,24,24,25, 26,27,27,28,29,29,30,31,32,32,33,34,34,35,36,36, 37,38,39,39,40,41,41,42,43,44,44,45,46,46,47,48, 48,49,50,51,51,52,53,53]