結果
| 問題 |
No.3087 University Coloring
|
| コンテスト | |
| ユーザー |
👑 |
| 提出日時 | 2025-04-04 22:28:31 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 58 ms / 2,000 ms |
| コード長 | 2,332 bytes |
| コンパイル時間 | 20,063 ms |
| コンパイル使用メモリ | 403,892 KB |
| 実行使用メモリ | 16,724 KB |
| 最終ジャッジ日時 | 2025-04-12 02:36:28 |
| 合計ジャッジ時間 | 21,010 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 33 |
ソースコード
//#![allow(unused)]
#[allow(unused_imports)]
use std::{
cell::RefCell, convert::{Infallible, TryFrom, TryInto as _},
fmt::{self, Debug, Display, Formatter,}, fs::{File}, hash::{Hash, Hasher},
iter::{Product, Sum}, marker::PhantomData,
ops::{Add, AddAssign, Sub, SubAssign, Div, DivAssign, Mul, MulAssign, Neg, RangeBounds},
str::{FromStr, SplitWhitespace}, sync::{atomic::{self, AtomicU32, AtomicU64}, Once},
collections::{*, btree_map::Range}, mem::{swap},
cmp::{self, Reverse, Ordering, Eq, PartialEq, PartialOrd},
thread::LocalKey, f64::consts::PI, time::Instant, rc::Rc,
io::{self, stdin, Read, read_to_string, BufWriter, BufReader, stdout, Write},
};
#[allow(unused_imports)]
use proconio::{input, input_interactive, marker::{*}};
#[allow(unused_imports)]
//use rand::{thread_rng, Rng, seq::SliceRandom};
#[allow(unused_imports)]
//use ac_library::{*};
#[allow(dead_code)]
const INF: i64 = 1<<60;
#[allow(dead_code)]
const MOD: i64 = 1000000007;
#[allow(dead_code)]
const D: [(usize, usize); 4] = [(1, 0), (0, 1), (!0, 0), (0, !0)];
pub struct UnionFind{
parent: Vec<i32>,
}
impl UnionFind{
pub fn new(n: usize)->Self{
UnionFind{
parent: vec![-1; n],
}
}
pub fn find(&mut self, r: usize)->usize{
if self.parent[r] < 0{return r;}
let p = self.find(self.parent[r] as usize);
self.parent[r] = p as i32;
p
}
pub fn union(&mut self, u: usize, v: usize){
let (mut pu, mut pv) = (self.find(u), self.find(v));
if pu==pv{return;}
if self.parent[pu] > self.parent[pv]{
swap(&mut pu, &mut pv);
}
self.parent[pu] += self.parent[pv];
self.parent[pv] = pu as i32;
}
pub fn same(&mut self, u: usize, v: usize)->bool{
self.find(u)==self.find(v)
}
pub fn size(&mut self, p: usize)->usize{
let r = self.find(p);
(-self.parent[r]) as usize
}
}
//use proconio::fastout;
//#[fastout]
fn main() {
input! {
n: usize, m: usize,
mut e: [(Usize1,Usize1,i64); m],
}
let mut uf = UnionFind::new(n);
let mut ans = 0;
e.sort_by(|u, v| v.2.cmp(&u.2));
for &(u, v, w) in &e{
if uf.same(u, v){continue}
uf.union(u, v);
ans += 2*w;
}
println!("{}", ans);
}