Mod Operator

Akshay is interested in mathematics, one day he came across a problem of modulus operator.He has a list of M integers say arr[M] and has to find all integers K such that : - K > 1 - arr[1]%K = arr[2]%K = arr[3]%K = ... = arr[M]%K where '%' is a modulus operator. Help Akshay to find all such K's. ###Input: - First line of input contains an integer M. Then M lines follow each containing one integ