#Write a function that takes an array/list of numbers and returns a number such that

#Explanation total([1,2,3,4,5]) => 48

#1+2=3--\ 3+5 =>     8 \
#2+3=5--/ \            ==  8+12=>20\
#          ==>5+7=> 12 / \           20+28 => 48
#3+4=7--\ /            == 12+16=>28/
#4+5=9--/ 7+9 =>     16  /

#if total([1,2,3]) => 8 then

#first+second => 3 \
#                   then 3+5 => 8
#second+third => 5 /
#--------------------------------------------------------------------------------------

def total(arr):
    arr_scrap = []
    for i in range(1, len(arr)):
        arr_scrap.append( arr[i] + arr[i-1] )
    arr = arr_scrap
    del arr_scrap

    if len(arr) == 1:
        return arr[0]
    else:
        return total(arr)

print(total([1,2,3,4,5,6,7,8,9,10]))