結果
問題 |
No.3087 University Coloring
|
ユーザー |
![]() |
提出日時 | 2025-04-04 23:17:58 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 916 ms / 2,000 ms |
コード長 | 2,341 bytes |
コンパイル時間 | 230 ms |
コンパイル使用メモリ | 82,652 KB |
実行使用メモリ | 128,388 KB |
最終ジャッジ日時 | 2025-04-04 23:18:26 |
合計ジャッジ時間 | 23,844 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 33 |
ソースコード
import copy import heapq import itertools import math import operator import sys from bisect import bisect, bisect_left, bisect_right, insort from collections import Counter, deque from fractions import Fraction from functools import cmp_to_key, lru_cache, partial from inspect import currentframe from math import ceil, gcd, log10, pi, sqrt # import pypyjit # pypyjit.set_param('max_unroll_recursion=-1') input = sys.stdin.readline sys.setrecursionlimit(10000000) # mod = 10 ** 9 + 7 mod = 998244353 # mod = 1 << 128 # mod = 10 ** 30 + 1 INF = 1 << 61 DIFF = 10 ** -9 DX = [1, 0, -1, 0, 1, 1, -1, -1] DY = [0, 1, 0, -1, 1, -1, 1, -1] def read_values(): return tuple(map(int, input().split())) def read_index(): return tuple(map(lambda x: int(x) - 1, input().split())) def read_list(): return list(read_values()) def read_lists(N): return [read_list() for _ in range(N)] def dprint(*values): print(*values, file=sys.stderr) def dprint2(*values): names = {id(v): k for k, v in currentframe().f_back.f_locals.items()} dprint(", ".join(f"{names.get(id(value), '???')}={repr(value)}" for value in values)) class UnionFind: def __init__(self, N): self.state = [-1] * N self.rank = [0] * N self.num_group = N def get_parent(self, a): p = self.state[a] if p < 0: return a q = self.get_parent(p) self.state[a] = q return q def make_pair(self, a, b): pa = self.get_parent(a) pb = self.get_parent(b) if pa == pb: return if self.rank[pa] > self.rank[pb]: pa, pb = pb, pa a, b = b, a elif self.rank[pa] == self.rank[pb]: self.rank[pb] += 1 self.state[pb] += self.state[pa] self.state[pa] = pb self.state[a] = pb self.num_group -= 1 def is_pair(self, a, b): return self.get_parent(a) == self.get_parent(b) def get_size(self, a): return -self.state[self.get_parent(a)] def main(): N, M = read_values() L = read_lists(M) L.sort(key=lambda x: x[-1], reverse=True) uf = UnionFind(N + 1) res = 0 for a, b, c in L: if uf.is_pair(a, b): continue uf.make_pair(a, b) res += 2 * c print(res) if __name__ == "__main__": main()