He's being sarcastic.
No, I'm trying to make OP think. If OP doesn't get it, OP should ask. Then. my next question would be what range of values can be store in an int, and then whether OP really needs to deal with negative pin numbers. At some point, I'd ask about the range that can be stored in other types. At some point, OP should realize that there are smaller types that are more appropriate.
And, that is going to be essential, given the amount of data he/she is going to be dealing with. The wrong type for any array is going to either waste memory, which will be in short supply, or cause overflow. It is, therefore, essential to understand, BEFORE writing a sh*tload of code, about how much memory is available, and how not to waste any of it.