結果
問題 | No.422 文字列変更 (Hard) |
ユーザー |
|
提出日時 | 2021-11-15 00:33:00 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 142 ms / 3,000 ms |
コード長 | 3,496 bytes |
コンパイル時間 | 15,247 ms |
コンパイル使用メモリ | 380,120 KB |
実行使用メモリ | 137,216 KB |
最終ジャッジ日時 | 2024-11-30 11:49:00 |
合計ジャッジ時間 | 15,596 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 16 |
ソースコード
use std::io::{Write, BufWriter};// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8macro_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 {($next:expr, chars) => {read_value!($next, String).chars().collect::<Vec<char>>()};($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));}trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }impl<T: PartialOrd> Change for T {fn chmax(&mut self, x: T) { if *self < x { *self = x; } }fn chmin(&mut self, x: T) { if *self > x { *self = x; } }}// Tags: dp, automatonfn main() {let out = std::io::stdout();let mut out = BufWriter::new(out.lock());macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}input! {n: usize, m: usize,s: chars,t: chars,}// mode: 0: replace 1: insert 2: deleteconst INF: i32 = 1 << 28;let mut dp = vec![vec![[(INF, 0, 0, 0); 3]; m + 1]; n + 1];dp[0][0][0] = (0, 0, 0, 0);for i in 0..n + 1 {for j in 0..m + 1 {for _ in 0..2 {let val = (dp[i][j][0].0 + 7, i, j, 0);for k in 1..3 {dp[i][j][k].chmin(val);let val = (dp[i][j][k].0, i, j, k);dp[i][j][0].chmin(val);}}// 0: replaceif i < n && j < m {let val = (dp[i][j][0].0 + if s[i] == t[j] { 0 } else { 5 },i, j, 0);dp[i + 1][j + 1][0].chmin(val);}// 1: insertif j < m {let val = (dp[i][j][1].0 + 2,i, j, 1);dp[i][j + 1][1].chmin(val);}// 2: deleteif i < n {let val = (dp[i][j][2].0 + 2,i, j, 2);dp[i + 1][j][2].chmin(val);}}}let (sc, _, _, _) = dp[n][m][0];puts!("{}\n", sc);let mut x = n;let mut y = m;let mut z = 0;let mut rs = vec![];let mut rt = vec![];while (x, y, z) != (0, 0, 0) {let (_, nx, ny, nz) = dp[x][y][z];if (nx, ny) == (x, y) {z = nz;continue;}assert_eq!(nz, z);match z {0 => {rs.push(s[nx]);rt.push(t[ny]);}1 => {rs.push('-');rt.push(t[ny]);}2 => {rs.push(s[nx]);rt.push('-');}_ => panic!(),}x = nx;y = ny;}rs.reverse();rt.reverse();puts!("{}\n", rs.into_iter().collect::<String>());puts!("{}\n", rt.into_iter().collect::<String>());}