結果
問題 | No.2494 Sum within Components |
ユーザー | FromBooska |
提出日時 | 2023-10-06 21:52:18 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 313 ms / 2,000 ms |
コード長 | 1,750 bytes |
コンパイル時間 | 476 ms |
コンパイル使用メモリ | 82,364 KB |
実行使用メモリ | 153,780 KB |
最終ジャッジ日時 | 2024-07-26 16:01:31 |
合計ジャッジ時間 | 3,685 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 17 |
ソースコード
# Union Find class UnionFind(): def __init__(self, n): self.n = n self.parents = [-1] * n def find(self, x): if self.parents[x] < 0: return x else: self.parents[x] = self.find(self.parents[x]) return self.parents[x] def unite(self, x, y): x = self.find(x) y = self.find(y) if x == y: return if self.parents[x] > self.parents[y]: x, y = y, x self.parents[x] += self.parents[y] self.parents[y] = x def size(self, x): return -self.parents[self.find(x)] def same(self, x, y): return self.find(x) == self.find(y) def members(self, x): root = self.find(x) return [i for i in range(self.n) if self.find(i) == root] def roots(self): return [i for i, x in enumerate(self.parents) if x < 0] def group_count(self): return len(self.roots()) def all_group_members(self): group_members = defaultdict(list) for member in range(self.n): group_members[self.find(member)].append(member) return group_members def __str__(self): return '\n'.join(f'{r}: {m}' for r, m in self.all_group_members().items()) N, M = map(int, input().split()) UF = UnionFind(N+1) A = [0]+list(map(int, input().split())) for i in range(M): u, v = map(int, input().split()) if UF.same(u, v) == False: UF.unite(u, v) from collections import defaultdict ans = 1 mod = 998244353 for members in UF.all_group_members().values(): if members == [0]: continue s = 0 for m in members: s += A[m] ans *= pow(s, len(members), mod) ans %= mod print(ans)