結果
問題 |
No.1916 Making Palindrome on Gird
|
ユーザー |
|
提出日時 | 2022-09-19 20:10:39 |
言語 | Rust (1.83.0 + proconio) |
結果 |
MLE
|
実行時間 | - |
コード長 | 2,855 bytes |
コンパイル時間 | 15,866 ms |
コンパイル使用メモリ | 379,688 KB |
実行使用メモリ | 816,512 KB |
最終ジャッジ日時 | 2024-12-22 02:38:14 |
合計ジャッジ時間 | 40,420 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 10 MLE * 20 |
コンパイルメッセージ
warning: unused import: `VecDeque` --> src/main.rs:1:24 | 1 | use std::collections::{VecDeque, HashSet}; | ^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default
ソースコード
use std::collections::{VecDeque, HashSet}; const SDX: [isize; 2] = [1, 0]; const SDY: [isize; 2] = [0, 1]; const EDX: [isize; 2] = [-1, 0]; const EDY: [isize; 2] = [0, -1]; const MOD: usize = 1e9 as usize + 7; fn main() { let mut hw = String::new(); std::io::stdin().read_line(&mut hw).ok(); let hw: Vec<usize> = hw.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let h = hw[0]; let w = hw[1]; let grid = (0..h).map(|_| { let mut s = String::new(); std::io::stdin().read_line(&mut s).ok(); let s = s.trim(); s.chars().collect::<Vec<char>>() }) .collect::<Vec<_>>(); let mut dp = vec![vec![vec![vec![0usize; w]; h]; w]; h]; let mut frontier = HashSet::new(); let middle = (h+w)/2-1; if (h+w) % 2 == 0 { for i in 0..h.min(w) { let (x, y) = if h > w { (middle-i, i) } else { (i, middle-i) }; dp[x][y][x][y] = 1; frontier.insert((x, y, x, y)); } } else { for i in 0..h.min(w) { let (x, y) = if h > w { (middle - i, i) } else { (i, middle - i) }; for dir in 0..2 { let nx = x as isize + SDX[dir]; let ny = y as isize + SDY[dir]; if nx >= 0 && ny >= 0 && nx < h as isize && ny < w as isize { let nx = nx as usize; let ny = ny as usize; if grid[x][y] == grid[nx][ny] { dp[x][y][nx][ny] += 1; frontier.insert((x, y, nx, ny)); } } } } } for _ in 0..middle { let mut next_frontier = HashSet::new(); for &(sx, sy, gx, gy) in frontier.iter() { for sdir in 0..2 { let nsx = sx as isize + EDX[sdir]; let nsy = sy as isize + EDY[sdir]; if !(nsx >= 0 && nsy >= 0 && nsx < h as isize && nsy < w as isize) { continue; } let nsx = nsx as usize; let nsy = nsy as usize; for edir in 0..2 { let ngx = gx as isize + SDX[edir]; let ngy = gy as isize + SDY[edir]; if ngx >= 0 && ngy >= 0 && ngx < h as isize && ngy < w as isize { let ngx = ngx as usize; let ngy = ngy as usize; if grid[nsx][nsy] == grid[ngx][ngy] { dp[nsx][nsy][ngx][ngy] += dp[sx][sy][gx][gy]; dp[nsx][nsy][ngx][ngy] %= MOD; next_frontier.insert((nsx, nsy, ngx, ngy)); } } } } } frontier = next_frontier; } println!("{}", dp[0][0][h-1][w-1]); }