ارسال شماره 3
x = int(input())
L = list(map(int, input().split()))
ans = 0
for i in range(x // 2):
ans += min(L[i], L[x - 1 - i])
print(ans)
x = int(input())
L = list(map(int, input().split()))
ans = 0
for i in range(x // 2):
ans += min(L[i], L[x - 1 - i])
print(ans)