結果
問題 | No.2999 Long Long Friedrice |
ユーザー |
![]() |
提出日時 | 2024-12-16 10:33:02 |
言語 | Python3 (3.13.1 + numpy 2.2.1 + scipy 1.14.1) |
結果 |
WA
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,024 bytes |
コンパイル時間 | 238 ms |
コンパイル使用メモリ | 13,056 KB |
実行使用メモリ | 19,700 KB |
最終ジャッジ日時 | 2024-12-23 23:31:33 |
合計ジャッジ時間 | 18,286 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 6 |
other | AC * 32 WA * 1 |
ソースコード
import typing class DSU: ''' Implement (union by size) + (path halving) Reference: Zvi Galil and Giuseppe F. Italiano, Data structures and algorithms for disjoint set union problems ''' def __init__(self, n: int = 0) -> None: self._n = n self.parent_or_size = [-1] * n def merge(self, a: int, b: int) -> int: assert 0 <= a < self._n assert 0 <= b < self._n x = self.leader(a) y = self.leader(b) if x == y: return x if -self.parent_or_size[x] < -self.parent_or_size[y]: x, y = y, x self.parent_or_size[x] += self.parent_or_size[y] self.parent_or_size[y] = x return x def same(self, a: int, b: int) -> bool: assert 0 <= a < self._n assert 0 <= b < self._n return self.leader(a) == self.leader(b) def leader(self, a: int) -> int: assert 0 <= a < self._n parent = self.parent_or_size[a] while parent >= 0: if self.parent_or_size[parent] < 0: return parent self.parent_or_size[a], a, parent = ( self.parent_or_size[parent], self.parent_or_size[parent], self.parent_or_size[self.parent_or_size[parent]] ) return a def size(self, a: int) -> int: assert 0 <= a < self._n return -self.parent_or_size[self.leader(a)] def groups(self) -> typing.List[typing.List[int]]: leader_buf = [self.leader(i) for i in range(self._n)] result: typing.List[typing.List[int]] = [[] for _ in range(self._n)] for i in range(self._n): result[leader_buf[i]].append(i) return list(filter(lambda r: r, result)) n = int(input()) a = list(map(int, input().split())) b = list(map(int, input().split())) inf = 10**6 d = DSU(inf + 1) for i in range(n): d.merge(a[i], a[i] + b[i]) ans = 0 for i in range(inf + 1): if d.same(1, i): ans = i print(ans)