結果
問題 | No.1420 国勢調査 (Easy) |
ユーザー | 57tggx |
提出日時 | 2021-01-29 15:44:56 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 167 ms / 2,000 ms |
コード長 | 4,558 bytes |
コンパイル時間 | 13,367 ms |
コンパイル使用メモリ | 393,568 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-27 02:58:09 |
合計ジャッジ時間 | 20,159 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
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
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 45 ms
6,940 KB |
testcase_03 | AC | 45 ms
6,944 KB |
testcase_04 | AC | 46 ms
6,944 KB |
testcase_05 | AC | 46 ms
6,944 KB |
testcase_06 | AC | 45 ms
6,940 KB |
testcase_07 | AC | 32 ms
6,940 KB |
testcase_08 | AC | 32 ms
6,940 KB |
testcase_09 | AC | 32 ms
6,944 KB |
testcase_10 | AC | 32 ms
6,940 KB |
testcase_11 | AC | 32 ms
6,940 KB |
testcase_12 | AC | 6 ms
6,944 KB |
testcase_13 | AC | 127 ms
6,940 KB |
testcase_14 | AC | 6 ms
6,940 KB |
testcase_15 | AC | 130 ms
6,944 KB |
testcase_16 | AC | 127 ms
6,944 KB |
testcase_17 | AC | 133 ms
6,940 KB |
testcase_18 | AC | 131 ms
6,940 KB |
testcase_19 | AC | 130 ms
6,940 KB |
testcase_20 | AC | 129 ms
6,940 KB |
testcase_21 | AC | 135 ms
6,940 KB |
testcase_22 | AC | 167 ms
6,944 KB |
testcase_23 | AC | 164 ms
6,940 KB |
testcase_24 | AC | 165 ms
6,940 KB |
testcase_25 | AC | 163 ms
6,944 KB |
testcase_26 | AC | 165 ms
6,940 KB |
testcase_27 | AC | 36 ms
6,940 KB |
testcase_28 | AC | 36 ms
6,940 KB |
testcase_29 | AC | 34 ms
6,944 KB |
testcase_30 | AC | 35 ms
6,940 KB |
testcase_31 | AC | 36 ms
6,940 KB |
ソースコード
fn main() { let input = Input::read(); assert!(matches!(input.n, 1..=100000)); assert!(matches!(input.m, 1..=100000)); let mut union_find = UnionFind::new(input.n); for &(a, b, y) in &input.t { assert!(a < b && b < input.n); assert!(matches!(y, 0..=0x3fffffff)); if let Some(diff) = union_find.diff(a, b) { if diff != y { println!("-1"); return; } } else { union_find.unite(a, b, y); } // dbg!(&union_find); } for i in union_find.construct() { println!("{}", i); } } #[derive(Debug)] struct UnionFind { n: usize, parent: Vec<usize>, diff: Vec<u32>, size: Vec<usize>, } impl UnionFind { fn new(n: usize) -> UnionFind { UnionFind { n: n, parent: (0..n).collect(), diff: vec![0; n], size: vec![1; n], } } fn root(&mut self, index: usize) -> usize { if self.parent[index] == index { index } else { let ret = self.root(self.parent[index]); self.diff[index] ^= self.diff[self.parent[index]]; self.parent[index] = ret; ret } } fn diff(&mut self, index1: usize, index2: usize) -> Option<u32> { let root1 = self.root(index1); let root2 = self.root(index2); if root1 == root2 { (self.diff[index1] ^ self.diff[index2]).into() } else { None } } fn unite_root(&mut self, root1: usize, root2: usize, diff: u32) { assert_ne!(root1, root2); if self.size[root1] < self.size[root2] { self.unite_root(root2, root1, diff) } else { self.size[root1] += self.size[root2]; self.size[root2] = 0; self.parent[root2] = self.parent[root1]; self.diff[root2] = diff; } } fn unite(&mut self, index1: usize, index2: usize, diff: u32) { let root1 = self.root(index1); let root2 = self.root(index2); self.unite_root(root1, root2, diff ^ self.diff[index1] ^ self.diff[index2]) } fn construct(&mut self) -> &Vec<u32> { for i in 0..self.n { self.root(i); } &self.diff } } #[derive(Debug)] struct Input { n: usize, m: usize, t: Vec<(usize, usize, u32)>, } impl Input { fn read() -> Input { let stdin = std::io::stdin(); let (n, m) = { let mut s = String::new(); stdin.read_line(&mut s).unwrap(); match &split(&s).unwrap()[..] { [n, m] => (n.parse().unwrap(), m.parse().unwrap()), _ => panic!("input format error: N M"), } }; let t = { let mut v = Vec::new(); for i in 0..m { let (a, b) = { let mut s = String::new(); stdin.read_line(&mut s).unwrap(); match &split(&s).unwrap()[..] { [a, b] => (a.parse::<usize>().unwrap(), b.parse::<usize>().unwrap()), _ => panic!("input format error: A_{0} B_{0}", i + 1), } }; let a = a - 1; let b = b - 1; let y = { let mut s = String::new(); stdin.read_line(&mut s).unwrap(); match &split(&s).unwrap()[..] { [y] => y.parse().unwrap(), _ => panic!("input format error: Y_{0}", i + 1), } }; v.push((a, b, y)); } v }; assert_eq!( stdin.read_line(&mut String::new()).unwrap(), 0, "input format error: something left" ); Input { n: n, m: m, t: t } } } fn split(s: &str) -> Option<Vec<&str>> { enum State { Word(usize), Space, End, } let mut state = State::Word(0); let mut ret = Vec::new(); for (i, c) in s.char_indices() { let prev = match state { State::End => return None, State::Word(i) => i, State::Space => { state = State::Word(i); i } }; if c == ' ' || c == '\n' { ret.push(&s[prev..i]); state = if c == ' ' { State::Space } else { State::End }; } } ret.into() }