#![allow(unused_imports)]
#![allow(non_snake_case)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn main() {
    let n = read::<usize>();
    let mut a = read_vec::<i64>();

    let mut a_window = vec![0; n - 23];
    for i in 0..n - 24 + 1 {
        let mut sum = 0;
        for j in i..i + 24 {
            sum += a[j];
        }
        a_window[i] = sum;
    }
    let mut cur_max = *a_window.iter().max().unwrap();
    debug!(cur_max);

    let q = read::<usize>();
    for _ in 0..q {
        let v = read_vec::<i64>();
        let (t, v) = (v[0] as usize - 1, v[1]);
        let prev = a[t];
        a[t] = v;

        let start_idx = max(t as i64 - 23, 0) as usize;
        // let end_idx = min(n - 24, t + 23) + 1;
        for i in start_idx..min(t + 1, a_window.len()) {
            a_window[i] += a[t] - prev;
            cur_max = max(cur_max, a_window[i]);
        }
        println!("{}", cur_max);
    }
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}