class Fenwick_Tree:
    def __init__(self, n):
        self.n = n
        self.data = [0] * n

    def add(self, p, x):
        p += 1
        while p <= self.n:
            self.data[p - 1] += x
            p += p & -p

    def sum(self, l, r):
        '''範囲[l, r)(lからr-1まで)の総和を求める'''
        return self._sum(r) - self._sum(l)

    def _sum(self, r):
        '''範囲[0, r)(0からr-1まで)の総和を求める'''
        s = 0
        while r > 0:
            s += self.data[r - 1]
            r -= r & -r
        return s

def main():
    n = int(input())
    A = list(map(int, input().split()))
    FT = Fenwick_Tree(n)
    for i in range(n):
        FT.add(i, A[i])
    res = 0
    for i in range(n - 23):
        res = max(res, FT.sum(i, i + 24))
    q = int(input())
    for _ in range(q):
        t, v = map(int, input().split())
        t -= 1
        pv = FT.sum(t, t + 1)
        FT.add(t, v - pv)
        for i in range(t + 1, min(n, t + 24) + 1):
            res = max(res, FT.sum(max(0, i - 24), i))
        print(res)

if __name__ == '__main__':
    main()