# Given an array of ints length 3,
# return the sum of all the elements.
#
#
# sum3([1, 2, 3]) → 6
# sum3([5, 11, 2]) → 18
# sum3([7, 0, 0]) → 7

def sum3(arr):

    return sum(arr)


print(sum3([1,2,3]))
