結果
問題 | No.1293 2種類の道路 |
ユーザー | phspls |
提出日時 | 2022-11-30 23:48:51 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 77 ms / 2,000 ms |
コード長 | 2,706 bytes |
コンパイル時間 | 12,822 ms |
コンパイル使用メモリ | 392,412 KB |
実行使用メモリ | 17,760 KB |
最終ジャッジ日時 | 2024-10-07 19:27:55 |
合計ジャッジ時間 | 15,232 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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
6,816 KB |
testcase_01 | AC | 1 ms
6,816 KB |
testcase_02 | AC | 0 ms
6,816 KB |
testcase_03 | AC | 1 ms
6,816 KB |
testcase_04 | AC | 1 ms
6,820 KB |
testcase_05 | AC | 1 ms
6,820 KB |
testcase_06 | AC | 1 ms
6,820 KB |
testcase_07 | AC | 1 ms
6,820 KB |
testcase_08 | AC | 1 ms
6,820 KB |
testcase_09 | AC | 75 ms
10,732 KB |
testcase_10 | AC | 77 ms
10,736 KB |
testcase_11 | AC | 72 ms
10,728 KB |
testcase_12 | AC | 74 ms
10,728 KB |
testcase_13 | AC | 73 ms
10,736 KB |
testcase_14 | AC | 56 ms
12,356 KB |
testcase_15 | AC | 51 ms
12,372 KB |
testcase_16 | AC | 76 ms
13,112 KB |
testcase_17 | AC | 74 ms
12,724 KB |
testcase_18 | AC | 64 ms
17,760 KB |
testcase_19 | AC | 69 ms
15,224 KB |
testcase_20 | AC | 72 ms
15,228 KB |
testcase_21 | AC | 32 ms
6,816 KB |
testcase_22 | AC | 31 ms
6,816 KB |
testcase_23 | AC | 30 ms
6,816 KB |
コンパイルメッセージ
warning: unused variable: `croot` --> src/main.rs:87:11 | 87 | for (&croot, cchildren) in cmapping.iter() { | ^^^^^ help: if this is intentional, prefix it with an underscore: `_croot` | = note: `#[warn(unused_variables)]` on by default warning: field `n` is never read --> src/main.rs:5:5 | 4 | struct UnionFind { | --------- field in this struct 5 | n: usize, | ^ | = note: `#[warn(dead_code)]` on by default warning: method `chain_cnt` is never used --> src/main.rs:48:8 | 11 | impl UnionFind { | -------------- method in this implementation ... 48 | fn chain_cnt(&mut self, i: usize) -> usize { | ^^^^^^^^^
ソースコード
use std::collections::{HashMap, HashSet}; struct UnionFind { n: usize, parents: Vec<usize>, depths: Vec<usize>, chains: Vec<usize>, } impl UnionFind { fn new(n: usize) -> Self { UnionFind { n: n, parents: (0..n).collect(), depths: vec![0; n], chains: vec![1; n], } } fn equiv(&mut self, a: usize, b: usize) -> bool { self.find(a) == self.find(b) } fn unite(&mut self, a: usize, b: usize) { if self.equiv(a, b) { return; } let x = self.parents[a]; let y = self.parents[b]; if self.depths[x] > self.depths[y] { self.parents[x] = self.parents[y]; self.chains[y] += self.chains[x]; } else { self.parents[y] = self.parents[x]; self.chains[x] += self.chains[y]; if self.depths[x] == self.depths[y] { self.depths[x] += 1; } } } fn find(&mut self, a: usize) -> usize { if self.parents[a] == a { return a; } let p = self.find(self.parents[a]); self.parents[a] = p; p } fn chain_cnt(&mut self, i: usize) -> usize { let idx = self.find(i); self.chains[idx] } } fn main() { let mut ndw = String::new(); std::io::stdin().read_line(&mut ndw).ok(); let ndw: Vec<usize> = ndw.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let n = ndw[0]; let d = ndw[1]; let w = ndw[2]; let mut cuf = UnionFind::new(n); let mut wuf = UnionFind::new(n); for _ in 0..d { let mut ab = String::new(); std::io::stdin().read_line(&mut ab).ok(); let ab: Vec<usize> = ab.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let a = ab[0]-1; let b = ab[1]-1; cuf.unite(a, b); } for _ in 0..w { let mut ab = String::new(); std::io::stdin().read_line(&mut ab).ok(); let ab: Vec<usize> = ab.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let a = ab[0]-1; let b = ab[1]-1; wuf.unite(a, b); } let mut cmapping = HashMap::new(); let mut wmapping = HashMap::new(); for i in 0..n { cmapping.entry(cuf.find(i)).or_insert(vec![]).push(i); *wmapping.entry(wuf.find(i)).or_insert(0usize) += 1; } let mut result = 0usize; for (&croot, cchildren) in cmapping.iter() { let wchildren = cchildren.iter().map(|&v| wuf.find(v)).collect::<HashSet<usize>>().iter().map(|&v| wmapping.get(&v).unwrap()).sum::<usize>(); result += cchildren.len() * wchildren; } println!("{}", result - n); }