# -*- coding: utf-8 -*-
from math import sqrt
def inpl(): return list(map(int, input().split()))

class SegmentTree:
    
    def __init__(self, N, init_node=None):
        self.size = 2**int.bit_length(N)
        self.node = [0]*(2*self.size-1)
        if not init_node is None:
            for i in range(N):
                self.node[i+self.size-1] = init_node[i]
        for i in range(self.size-2, -1, -1):
            self.node[i] = max(self.node[2*i+1], self.node[2*i+2])

    def add(self, x, val):
        x += self.size - 1
        self.node[x] += val
        while x:
            x = (x-1)//2
            self.node[x] = max(self.node[2*x+1], self.node[2*x+2])


N = int(input())
A = [0] * 23 + inpl() + [0]*23

s = sum(A[:24])
X = [0]*(N + 46)
for i in range(24):
    X[i] = A[23]*1


s = A[23]*1
for i in range(24, N+46):
    s += A[i] - A[i-24]
    X[i] = s


seg = SegmentTree(len(X), X)
for _ in range(int(input())):
    t, v = inpl()
    t += 22
    d = v - A[t]
    A[t] = v
    for i in range(t-23, t+24):
        seg.add(i, d)
    print(seg.node[0])