結果

問題 No.3031 曲面の向き付け
ユーザー Moss_Local
提出日時 2025-02-21 22:32:39
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 296 ms / 2,000 ms
コード長 4,837 bytes
コンパイル時間 14,030 ms
コンパイル使用メモリ 398,388 KB
実行使用メモリ 46,444 KB
最終ジャッジ日時 2025-02-21 22:33:07
合計ジャッジ時間 20,538 ms
ジャッジサーバーID
（参考情報） 		judge3 / 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 * 4
other AC * 29
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: variable does not need to be mutable
   --> src/main.rs:111:9
    |
111 |     let mut vec: Vec<i64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`
    |
    = note: `#[warn(unused_mut)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:117:9
    |
117 |     let mut vec: Vec<i64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:122:9
    |
122 |     let mut vec: Vec<usize> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:128:9
    |
128 |     let mut vec: Vec<f64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:133:9
    |
133 |     let mut vec: Vec<char> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:138:9
    |
138 |     let mut vec: Vec<usize> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:143:9
    |
143 |     let mut vec: Vec<i64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:149:9
    |
149 |     let mut vec: Vec<usize> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

ソースコード

diff #
プレゼンテーションモードにする

#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(unused_macros)]
use std::cmp::*;
use std::fmt::*;
use std::hash::*;
use std::io::BufRead;
use std::iter::FromIterator;
use std::*;
use std::{cmp, collections, fmt, io, iter, ops, str};
const INF: i64 = 1223372036854775807;
const UINF: usize = INF as usize;
const LINF: i64 = 2147483647;
const INF128: i128 = 1223372036854775807000000000000;
const MOD1: i64 = 1000000007;
const MOD9: i64 = 998244353;
const MOD: i64 = MOD9;
const UMOD: usize = MOD as usize;
const M_PI: f64 = 3.14159265358979323846;
use cmp::Ordering::*;
use std::collections::*;
use std::io::stdin;
use std::io::stdout;
use std::io::Write;
macro_rules! p {
    ($x:expr) => {
        println!("{}", $x);
    };
}
macro_rules! vp {
    ($x:expr) => {
        println!(
            "{}",
            $x.iter()
                .map(|x| x.to_string())
                .collect::<Vec<_>>()
                .join(" ")
        );
    };
}
macro_rules! d {
    ($x:expr) => {
        eprintln!("{:?}", $x);
    };
}
macro_rules! yn {
    ($val:expr) => {
        if $val {
            println!("Yes");
        } else {
            println!("No");
        }
    };
}
macro_rules! map{
    ($($key:expr => $val:expr),*) => {
        {
            let mut map = ::std::collections::BTreeMap::new();
            $(
                map.insert($key, $val);
            )*
            map
        }
    };
}
macro_rules! set{
    ($($key:expr),*) => {
        {
            let mut set = ::std::collections::BTreeSet::new();
            $(
                set.insert($key);
            )*
            set
        }
    };
}
#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}
#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}
#[allow(dead_code)]
fn read_mat<T: std::str::FromStr>(n: usize) -> Vec<Vec<T>> {
    (0..n).map(|_| read_vec()).collect()
}
#[allow(dead_code)]
fn readii() -> (i64, i64) {
    let mut vec: Vec<i64> = read_vec();
    (vec[0], vec[1])
}
#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
    let mut vec: Vec<i64> = read_vec();
    (vec[0], vec[1], vec[2])
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
    let mut vec: Vec<usize> = read_vec();
    (vec[0], vec[1])
}
#[allow(dead_code)]
fn readff() -> (f64, f64) {
    let mut vec: Vec<f64> = read_vec();
    (vec[0], vec[1])
}
fn readcc() -> (char, char) {
    let mut vec: Vec<char> = read_vec();
    (vec[0], vec[1])
}
fn readuuu() -> (usize, usize, usize) {
    let mut vec: Vec<usize> = read_vec();
    (vec[0], vec[1], vec[2])
}
#[allow(dead_code)]
fn readiiii() -> (i64, i64, i64, i64) {
    let mut vec: Vec<i64> = read_vec();
    (vec[0], vec[1], vec[2], vec[3])
}
#[allow(dead_code)]
fn readuuuu() -> (usize, usize, usize, usize) {
    let mut vec: Vec<usize> = read_vec();
    (vec[0], vec[1], vec[2], vec[3])
}
//derive clone
#[derive(Clone)]
struct E {
    to: usize,
    p: u8,
}
fn main() {
    let m: usize = read();
    let mut t = vec![];
    for _ in 0..m {
        let v: Vec<u32> = read_vec();
        t.push((v[0], v[1], v[2]));
    }
    let mut e = HashMap::new();
    for (i, &(a, b, c)) in t.iter().enumerate() {
        let edges = vec![((a, b), 0u8), ((a, c), 1u8), ((b, c), 0u8)];
        for ((u, v), f) in edges {
            e.entry((u, v)).or_insert(vec![]).push((i, f));
        }
    }
    let mut g = vec![vec![]; m];
    for (_, v) in e {
        if v.len() > 2 {
            p!("NO");
            return;
        }
        if v.len() == 2 {
            let (t1, f1) = v[0];
            let (t2, f2) = v[1];
            let p = 1 ^ (f1 ^ f2);
            g[t1].push(E { to: t2, p });
            g[t2].push(E { to: t1, p });
        }
    }
    let mut c = vec![None; m];
    //0の渦の隣には1が隣接してなければならない三角形を単位にして二部グラフ判定をする。
    for i in 0..m {
        if c[i].is_none() {
            let mut q = VecDeque::new();
            c[i] = Some(0);
            q.push_back(i);
            
            while let Some(u) = q.pop_front() {
                let cu = c[u].unwrap();
                for e in &g[u] {
                    let v = e.to;
                    let r = cu ^ e.p;
                    if let Some(cv) = c[v] {
                        if cv != r {
                            p!("NO");
                            return;
                        }
                    } else {
                        c[v] = Some(r);
                        q.push_back(v);
                    }
                }
            }
        }
    }
    p!("YES");
}
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