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Are the following sentences correct?

1: Should you have any problem, please feel free to ask me.

2: Had he not help you, you could never have succeeded.
Comments 
Had he not helped you, you could never have succeeded.
Thank you, Tanit.
Do we need to put question mark at the end of this sentence?

Should you have any problem, please feel free to ask me (. or ?)
It is not a question; ergo, no question mark.
I found one site explaining this. Check this out! Should you have any problems