n = int(input())
a = list(map(int, input().split()))
q = int(input())

for _ in range(q):
    x, b = map(int, input().split())
    x -= 1

    left = 0
    for i in range(x-1, -1, -1):
        if a[i] == 0:
            break
        else:
            left += a[i]

    right = 0
    for i in range(x+1, n):
        if a[i] == 0:
            break
        else:
            right += a[i]

    print(left + right + b)