結果
問題 | No.1703 Much Matching |
ユーザー | koba-e964 |
提出日時 | 2021-10-08 23:17:41 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 373 ms / 2,000 ms |
コード長 | 3,308 bytes |
コンパイル時間 | 16,126 ms |
コンパイル使用メモリ | 406,036 KB |
実行使用メモリ | 23,364 KB |
最終ジャッジ日時 | 2024-07-23 07:09:17 |
合計ジャッジ時間 | 16,835 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 97 ms
7,800 KB |
testcase_07 | AC | 5 ms
6,944 KB |
testcase_08 | AC | 102 ms
8,184 KB |
testcase_09 | AC | 118 ms
9,472 KB |
testcase_10 | AC | 16 ms
6,944 KB |
testcase_11 | AC | 24 ms
6,940 KB |
testcase_12 | AC | 5 ms
6,940 KB |
testcase_13 | AC | 43 ms
6,944 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 20 ms
6,944 KB |
testcase_16 | AC | 63 ms
6,944 KB |
testcase_17 | AC | 70 ms
6,944 KB |
testcase_18 | AC | 2 ms
6,940 KB |
testcase_19 | AC | 157 ms
11,416 KB |
testcase_20 | AC | 19 ms
6,940 KB |
testcase_21 | AC | 184 ms
12,964 KB |
testcase_22 | AC | 70 ms
6,940 KB |
testcase_23 | AC | 52 ms
6,944 KB |
testcase_24 | AC | 2 ms
6,940 KB |
testcase_25 | AC | 6 ms
6,944 KB |
testcase_26 | AC | 34 ms
6,940 KB |
testcase_27 | AC | 74 ms
6,944 KB |
testcase_28 | AC | 151 ms
10,956 KB |
testcase_29 | AC | 27 ms
6,944 KB |
testcase_30 | AC | 41 ms
6,940 KB |
testcase_31 | AC | 4 ms
6,940 KB |
testcase_32 | AC | 81 ms
6,944 KB |
testcase_33 | AC | 51 ms
6,944 KB |
testcase_34 | AC | 5 ms
6,944 KB |
testcase_35 | AC | 13 ms
6,940 KB |
testcase_36 | AC | 373 ms
23,364 KB |
testcase_37 | AC | 1 ms
6,944 KB |
ソースコード
use std::cmp::*; // 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() { input! { _n: usize, m: usize, q: usize, ab: [(usize1, usize1); q], } let mut ab = ab; ab.sort_by_key(|&(a, b)| (a, Reverse(b))); const INF: i64 = 1 << 50; let mut st = SegTree::new(m + 1, max, -INF); st.update(m, 0); for &(_a, b) in ab.iter().rev() { let val = st.query(b + 1, m + 1) + 1; let val = max(val, st.query(b, b + 1)); st.update(b, val); } println!("{}", st.query(0, m + 1)); }