from itertools import accumulate


N = int(input())
A = list(map(int, input().split()))
Aaccum = list(accumulate([0] + A))
maxn = 0
for i in range(N-24+1):
    maxn = max(maxn, Aaccum[i+24] - Aaccum[i])
result = []
Q = int(input())
for _ in range(Q):
    i, v = map(int, input().split())
    i -= 1
    A[i] = v
    for j in range(max(0, i-23), i+1):
        values = 0
        if j+24 > N:
            break
        for k in range(j, j+24):
            values += A[k]
        maxn = max(maxn, values)
    print(maxn)