ارسال شماره 119
size = int(input())
L = list(map(int, input().split()))
i = 0
numbers_of_ammo = 0
while i < len(L) // 2:
numbers_of_ammo += abs(L[i] - L[len(L) - 1 - i])
i += 1
print(numbers_of_ammo)
size = int(input())
L = list(map(int, input().split()))
i = 0
numbers_of_ammo = 0
while i < len(L) // 2:
numbers_of_ammo += abs(L[i] - L[len(L) - 1 - i])
i += 1
print(numbers_of_ammo)