結果

問題 No.1705 Mode of long array
ユーザー koba-e964
提出日時 2021-10-08 23:33:24
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 66 ms / 3,000 ms
コード長 3,691 bytes
コンパイル時間 23,854 ms
コンパイル使用メモリ 398,532 KB
実行使用メモリ 8,320 KB
最終ジャッジ日時 2024-07-23 07:45:54
合計ジャッジ時間 19,156 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 51
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: unused variable: `n`
   --> src/main.rs:98:9
    |
98  |         n: i64, m: usize,
    |         ^
    |
help: `n` is captured in macro and introduced a unused variable
   --> src/main.rs:25:13
    |
25  |           let var=readvalue!(var = read_value!(next, $t);
    |               ^^^^
...
97  | /     input! {
98  | |         n: i64, m: usize,
99  | |         a: [i64; m],
100 | |         q: usize,
101 | |         txy: [(i32, usize, i64); q],
102 | |     }
    | |_____- in this macro invocation
    = note: `#[warn(unused_variables)]` on by default
    = note: this warning originates in the macro `input_inner` which comes from the expansion of the macro `input` (in Nightly builds, run with -Z macro-backtrace for more info)

ソースコード

diff #
プレゼンテーションモードにする

#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
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, $t)).collect::<Vec<_>>()
};
($next:expr, usize1) => (read_value!($next, usize) - 1);
($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}
/**
* Segment Tree. This data structure is useful for fast folding on intervals of an array
* whose elements are elements of monoid I. Note that constructing this tree requires the identity
* element of I and the operation of I.
* Verified by: yukicoder No. 259 (http://yukicoder.me/submissions/100581)
* AGC015-E (http://agc015.contest.atcoder.jp/submissions/1461001)
* yukicoder No. 833 (https://yukicoder.me/submissions/703521)
*/
struct SegTree<I, BiOp> {
n: usize,
dat: Vec<I>,
op: BiOp,
e: I,
}
impl<I, BiOp> SegTree<I, BiOp>
where BiOp: Fn(I, I) -> I,
I: Copy {
pub fn new(n_: usize, op: BiOp, e: I) -> Self {
let mut n = 1;
while n < n_ { n *= 2; } // n is a power of 2
SegTree {n: n, dat: vec![e; 2 * n - 1], op: op, e: e}
}
/* ary[k] <- v */
pub fn update(&mut self, idx: usize, v: I) {
let mut k = idx + self.n - 1;
self.dat[k] = v;
while k > 0 {
k = (k - 1) / 2;
self.dat[k] = (self.op)(self.dat[2 * k + 1], self.dat[2 * k + 2]);
}
}
/* [a, b) (note: half-inclusive)
* http://proc-cpuinfo.fixstars.com/2017/07/optimize-segment-tree/ */
#[allow(unused)]
pub fn query(&self, mut a: usize, mut b: usize) -> I {
let mut left = self.e;
let mut right = self.e;
a += self.n - 1;
b += self.n - 1;
while a < b {
if (a & 1) == 0 {
left = (self.op)(left, self.dat[a]);
}
if (b & 1) == 0 {
right = (self.op)(self.dat[b - 1], right);
}
a = a / 2;
b = (b - 1) / 2;
}
(self.op)(left, right)
}
}
fn main() {
let out = std::io::stdout();
let mut out = BufWriter::new(out.lock());
macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
input! {
n: i64, m: usize,
a: [i64; m],
q: usize,
txy: [(i32, usize, i64); q],
}
let mut st = SegTree::new(m, max, (0, 0));
for i in 0..m {
st.update(i, (a[i], i + 1));
}
for (t, x, y) in txy {
if t == 3 {
puts!("{}\n", st.query(0, m).1);
} else {
let x = x - 1;
let (v, old) = st.query(x, x + 1);
let new = if t == 1 {
v + y
} else {
v - y
};
st.update(x, (new, old));
}
}
}
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