14 th day: Scope

class Difference:
    def __init__(self, a):
        self.__elements = a

    def computeDifference(self):
        maximum = 0
        for i in range(len(self.__elements)):
            for j in range(len(self.__elements)):
                absolute = abs(self.__elements[i]-self.__elements[j])
                if absolute>maximum:
                    maximum = absolute
        self.maximumDifference = maximum
                

# End of Difference class

_ = input()
a = [int(e) for e in input().split(' ')]

d = Difference(a)
d.computeDifference()

print(d.maximumDifference)

'''Sample Input

3
1 2 5

Sample Output

4
'''