Rules:

1. Start at 0.
2. Each consecutive +/- increases/decreases the number by an amount increasing by 1.
3. For example, + is 1, ++ is 3, +++ is 6, ++++ is 10, +++++ is 15, +++++- is 14.

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

51: -++++++++++--      (12)
52: ++++++++++--       (12)
53: -++++++++++-       (12)
54: ++++++++++-        (11)
55: ++++++++++         (10)
56: ++++++++++-++-     (14)
57: ++++++++++-++      (13)
58: ++++++++++--+++    (15)
59: ++++++++++-+++-    (15)
60: ++++++++++-+++     (14)
61: +++++++++++---+    (15)
62: -+++++++++++--     (14)
63: +++++++++++--      (13)
64: -+++++++++++-      (13)
65: +++++++++++-       (12)
66: +++++++++++        (11)
67: +++++++++++-++-    (15)
78: ++++++++++++       (12)
91: +++++++++++++      (13)
105: ++++++++++++++     (14)