結果
問題 | No.2179 Planet Traveler |
ユーザー | H20 |
提出日時 | 2023-01-06 22:58:46 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 2,765 ms / 3,000 ms |
コード長 | 2,409 bytes |
コンパイル時間 | 201 ms |
コンパイル使用メモリ | 82,400 KB |
実行使用メモリ | 166,888 KB |
最終ジャッジ日時 | 2024-05-07 22:43:13 |
合計ジャッジ時間 | 39,800 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 126 ms
88,944 KB |
testcase_01 | AC | 122 ms
89,108 KB |
testcase_02 | AC | 124 ms
89,096 KB |
testcase_03 | AC | 124 ms
88,996 KB |
testcase_04 | AC | 123 ms
88,840 KB |
testcase_05 | AC | 123 ms
88,900 KB |
testcase_06 | AC | 122 ms
88,576 KB |
testcase_07 | AC | 146 ms
89,472 KB |
testcase_08 | AC | 277 ms
90,468 KB |
testcase_09 | AC | 226 ms
90,396 KB |
testcase_10 | AC | 253 ms
90,780 KB |
testcase_11 | AC | 1,576 ms
148,576 KB |
testcase_12 | AC | 1,711 ms
149,372 KB |
testcase_13 | AC | 2,367 ms
154,832 KB |
testcase_14 | AC | 1,630 ms
153,192 KB |
testcase_15 | AC | 1,611 ms
154,360 KB |
testcase_16 | AC | 1,650 ms
152,916 KB |
testcase_17 | AC | 2,671 ms
166,068 KB |
testcase_18 | AC | 2,536 ms
164,708 KB |
testcase_19 | AC | 2,765 ms
166,888 KB |
testcase_20 | AC | 802 ms
103,284 KB |
testcase_21 | AC | 2,198 ms
159,024 KB |
testcase_22 | AC | 1,642 ms
136,164 KB |
testcase_23 | AC | 1,716 ms
132,044 KB |
testcase_24 | AC | 2,302 ms
150,784 KB |
testcase_25 | AC | 1,888 ms
137,736 KB |
testcase_26 | AC | 2,475 ms
156,140 KB |
testcase_27 | AC | 964 ms
104,808 KB |
testcase_28 | AC | 1,533 ms
124,444 KB |
testcase_29 | AC | 2,265 ms
151,192 KB |
ソースコード
# 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,xyti in enumerate(XYT): for j,xytj in enumerate(XYT[i+1:],start=i+1): if not uf.same(i,j): if xyti[2]==xytj[2]: xi,yi,ti = xyti xj,yj,tj = xytj 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))