N = int(input())
A = list(map(int, input().split()))
Q = int(input())
T = [0] * Q
V = [0] * Q
for i in range(Q):
    T[i], V[i] = map(int, input().split())

s = [0] * (N+1)
for i in range(N):
    if N >= 24:
        s[i+1] = s[i] + A[i] - s[i-23]
    else:
        s[i+1] = s[i] + A[i]

res = max(s)

for q in range(Q):
    diff = V[q] - A[T[q]-1]
    for i in range(24):
        if T[q]+i <= N:
            s[T[q]+i] += diff
            if res <= s[T[q]+i]:
                res = s[T[q]+i]
    print(res)