import sys

input = sys.stdin.buffer.readline

N = int(input())
A = list(map(int, input().split()))
table = [sum(A[i:i + 24]) for i in range(N - 23)]
Q = int(input())
ans = max(table)
for _ in range(Q):
    T, V = map(int, input().split())
    T -= 1
    diff = V - A[T]
    A[T] = V
    for i in range(max(0, T - 23), min(N - 24, T) + 1):
        table[i] += diff
        ans = max(ans, table[i])
    print(ans)