i d[0] d[mid] d[last] size 33: 67 1 33 65 33 32: 65 1 33 63 32 31: 63 1 31 61 31 30: 61 1 31 59 30 29: 59 1 29 57 29 28: 57 1 29 55 28 27: 55 1 27 53 27 26: 53 1 27 51 26 25: 51 1 25 49 25 24: 49 1 25 47 24 23: 47 1 23 45 23 22: 45 1 23 43 22 21: 43 1 21 41 21 20: 41 1 21 39 20 19: 39 1 19 37 19 18: 37 1 19 35 18 17: 35 1 17 33 17 16: 33 1 17 31 16 15: 31 1 15 29 15 14: 29 1 15 27 14 13: 27 1 13 25 13 12: 25 1 13 23 12 11: 23 1 11 21 11 10: 21 1 11 19 10 9: 19 1 9 17 9 8: 17 1 9 15 8 7: 15 1 7 13 7 6: 13 1 7 11 6 5: 11 1 5 9 5 4: 9 1 5 7 4 3: 7 1 3 5 3 2: 5 1 3 3 2 1: 3 1 1 1 1 34: 133 33: 129 32: 125 31: 121 30: 117 29: 113 28: 109 27: 105 26: 101 25: 97 24: 93 23: 89 22: 85 21: 81 20: 77 19: 73 18: 69 17: 65 16: 61 15: 57 14: 53 13: 49 12: 45 11: 41 10: 37 9: 33 8: 29 7: 25 6: 21 5: 17 4: 13 3: 9 2: 5 1: 1 size = 0