You stopped at a rest stop to grab a snack and stretch your legs, and now you forgot where you parked. There just so happens to be invisible parking numbers marked. The first part of the number is the number of fully open parking spaces on the left side of the parking lot.

 

The first part of your number is...

50
58
60
61
62
64
66
67
68
72
73
74
75
76
77
79
80
81
82
85
88
90
91
92
95
98
99
104
113
116
118