#831034 (PyPy3) No.2179 Planet Traveler

• 問題: No.2179 Planet Traveler
• ユーザー: H20
• 提出日時: 2023-01-06 22:54:32
• 言語: PyPy3 (7.3.15)
• 結果: TLE (最新)
  AC
  (最初)
• 実行時間: -
• コード長: 2,361 bytes
• コンパイル時間: 290 ms
• コンパイル使用メモリ: 82,304 KB
• 実行使用メモリ: 166,256 KB
• 最終ジャッジ日時: 2024-11-30 19:28:53
• 合計ジャッジ時間: 44,687 ms
• ジャッジサーバーID （参考情報）: judge4 / judge1

ファイルパターン	結果
sample	AC * 4
other	AC * 25 TLE * 1

ソースコード

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# UnionFind 参考は以下のサイト
# https://note.nkmk.me/python-union-find/
from collections import defaultdict
from decimal import Decimal
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 union(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())
def is_ok(s):
    uf = UnionFind(N)
    hs = Decimal(s)**Decimal('0.5')
    for i in range(N):
        for j in range(i+1,N):
            if not uf.same(i,j):
                xi,yi,ti = XYT[i]
                xj,yj,tj = XYT[j]
                if ti==tj:
                    if (xi-xj)**2+(yi-yj)**2<=s:
                        uf.union(i,j)
                else:
                    if XY[i][j]<=hs:
                        uf.union(i,j)
    return uf.same(0,N-1)
def meguru_bisect(ng, ok):
    while (abs(ok - ng) > 1):
        mid = (ok + ng) // 2
        if is_ok(mid):
            ok = mid
        else:
            ng = mid
    return ok
N = int(input())
XYT = [list(map(int, input().split())) for _ in range(N)]
D = []
for i in range(N):
    D.append(Decimal(XYT[i][0]**2+XYT[i][1]**2)**Decimal('0.5'))
XY = [[0]*N for _ in range(N)]
for i in range(N):
    for j in range(i+1,N):
        XY[i][j]=abs(D[i]-D[j])
print(meguru_bisect(-1,3200000001))
 
 
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