use std::cmp::*; use std::io::{Write, BufWriter}; // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr,) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) }; ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::>() }; ($next:expr, usize1) => (read_value!($next, usize) - 1); ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } fn main() { let out = std::io::stdout(); let mut out = BufWriter::new(out.lock()); macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););} input! { n: usize, a: [i64; n], q: usize, tv: [(usize1, i64); q], } let mut a = a; let mut ma = 0; let mut cur = 0; for i in 0..24 { cur += a[i]; } for i in 0..n - 23 { ma = max(ma, cur); if i + 24 < n { cur -= a[i]; cur += a[i + 24]; } } for &(t, v) in &tv { a[t] = v; let l = max(23, t) - 23; let r = min(n - 24, t) + 1; let mut cur = 0; for i in 0..24 { cur += a[l + i]; } for i in l..r { ma = max(ma, cur); if i + 1 < r { cur -= a[i]; cur += a[i + 24]; } } puts!("{}\n", ma); } }