結果
問題 | No.96 圏外です。 |
ユーザー | しらっ亭 |
提出日時 | 2015-08-31 00:02:50 |
言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,414 bytes |
コンパイル時間 | 171 ms |
コンパイル使用メモリ | 12,928 KB |
実行使用メモリ | 349,504 KB |
最終ジャッジ日時 | 2024-07-18 15:46:00 |
合計ジャッジ時間 | 77,481 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 1,764 ms
294,144 KB |
testcase_01 | AC | 1,797 ms
294,016 KB |
testcase_02 | AC | 1,808 ms
294,144 KB |
testcase_03 | AC | 1,796 ms
294,016 KB |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | RE | - |
testcase_21 | AC | 3,560 ms
336,292 KB |
testcase_22 | TLE | - |
testcase_23 | TLE | - |
testcase_24 | AC | 1,833 ms
294,144 KB |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
ソースコード
from collections import defaultdict from itertools import combinations import math class UnionFind: def __init__(self, n): self.par = list(range(n)) def find(self, x): if self.par[x] == x: return x else: self.par[x] = self.find(self.par[x]) return self.par[x] def union(self, x, y): x = self.find(x) y = self.find(y) if x == y: return self.par[x] = y def convex_hull(P): def veccross(A, B, C): return (C[0] - A[0]) * (B[1] - A[1]) - (C[1] - A[1]) * (B[0] - A[0]) n = len(P) if n <= 2: return list(range(n)) ps = [None] * n for i in range(n): ps[i] = (P[i], i) ps.sort() k = 0 res = [0] * (n * 2) for i in range(n): while k > 1 and veccross(P[res[k - 2]], P[res[k - 1]], ps[i][0]) <= 0: k -= 1 res[k] = ps[i][1] k += 1 t = k for i in range(n - 2, -1, -1): while k > t and veccross(P[res[k - 2]], P[res[k - 1]], ps[i][0]) <= 0: k -= 1 res[k] = ps[i][1] k += 1 return res[:k - 1] def m_dist(g, xs, ys): os = convex_hull([(xs[i], ys[i]) for i in g]) ma = 0 for i, j in combinations(os, 2): ma = max(ma, (xs[i] - xs[j]) ** 2 + (ys[i] - ys[j]) ** 2) return ma def solve(): N = int(input()) XS = [0] * N YS = [0] * N B = [[[] for y in range(2001)] for x in range(2001)] def b(x, y): if 0 <= x <= 2000 and 0 <= y <= 2000: return B[x][y] else: return [] ds = [(-1, -1), (0, -1), (1, -1), (-1, 0), (1, 0), (-1, 1), (0, 1), (1, 1)] uf = UnionFind(N) for i in range(N): x, y = map(int, input().split()) x += 10000 y += 10000 XS[i] = x YS[i] = y x10 = x // 10 y10 = y // 10 for dx, dy in ds: for j in b(x10 + dx, y10 + dy): if (x - XS[j]) ** 2 + (y - YS[j]) ** 2 <= 100: uf.union(i, j) b(x10, y10).append(i) gd = defaultdict(set) for i in range(N): gd[uf.find(i)].add(i) gs = list(gd.values()) if len(gs) == 0: print(1) else: ma = 0 for g in gd.values(): ma = max(ma, m_dist(g, XS, YS)) print(math.sqrt(ma) + 2) if __name__ == '__main__': solve()