ارسال شماره 541
n = int(input())
l = list(map(int, input().split()))
for i in range(len(l)):
x = l[i] - l[n- 1]
x = x + l[i]
print(x)
n = int(input())
l = list(map(int, input().split()))
for i in range(len(l)):
x = l[i] - l[n- 1]
x = x + l[i]
print(x)