結果
問題 | No.1690 Power Grid |
ユーザー | phspls |
提出日時 | 2022-11-16 00:06:20 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 101 ms / 3,000 ms |
コード長 | 3,135 bytes |
コンパイル時間 | 13,863 ms |
コンパイル使用メモリ | 383,924 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-16 22:33:22 |
合計ジャッジ時間 | 15,439 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 1 ms
6,816 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 55 ms
6,944 KB |
testcase_07 | AC | 54 ms
6,940 KB |
testcase_08 | AC | 52 ms
6,940 KB |
testcase_09 | AC | 52 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 1 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 11 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 89 ms
6,944 KB |
testcase_17 | AC | 53 ms
6,940 KB |
testcase_18 | AC | 22 ms
6,940 KB |
testcase_19 | AC | 87 ms
6,944 KB |
testcase_20 | AC | 101 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,944 KB |
testcase_22 | AC | 35 ms
6,944 KB |
testcase_23 | AC | 2 ms
6,940 KB |
testcase_24 | AC | 7 ms
6,944 KB |
testcase_25 | AC | 3 ms
6,944 KB |
testcase_26 | AC | 2 ms
6,944 KB |
testcase_27 | AC | 1 ms
6,944 KB |
コンパイルメッセージ
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
const INF: usize = 1usize << 60; 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 nmk = String::new(); std::io::stdin().read_line(&mut nmk).ok(); let nmk: Vec<usize> = nmk.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let n = nmk[0]; let m = nmk[1]; let k = nmk[2]; let mut a = String::new(); std::io::stdin().read_line(&mut a).ok(); let a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let mut paths = vec![vec![INF; n]; n]; for _ in 0..m { let mut xyz = String::new(); std::io::stdin().read_line(&mut xyz).ok(); let xyz: Vec<usize> = xyz.trim().split_whitespace().map(|s| s.parse().unwrap()).collect(); let x = xyz[0]-1; let y = xyz[1]-1; let z = xyz[2]; paths[x][y] = z; paths[y][x] = z; } for k in 0..n { for i in 0..n { for j in 0..n { paths[i][j] = paths[i][j].min(paths[i][k] + paths[k][j]); } } } let mut result = INF; for i in 0..1usize<<n { if i.count_ones() as usize != k { continue; } let targets = (0..n).filter(|&j| ((i >> j) & 1) == 1).collect::<Vec<usize>>(); let limit = targets.len(); let mut lines = Vec::with_capacity(k*(k-1) / 2); for j in 0..limit { for k in j+1..limit { lines.push((targets[j], targets[k], paths[targets[j]][targets[k]])); } } lines.sort_by_key(|&(_, _, c)| c); let mut uf = UnionFind::new(n); let mut costs = targets.iter().map(|&j| a[j]).sum::<usize>(); for &(l, r, cost) in lines.iter() { let pl = uf.find(l); let pr = uf.find(r); if pl == pr { continue; } uf.unite(pl, pr); costs += cost; } result = result.min(costs); } println!("{}", result); }