結果
問題 | No.199 星を描こう |
ユーザー | はむ吉🐹 |
提出日時 | 2016-09-04 12:11:38 |
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 | 1,796 bytes |
コンパイル時間 | 130 ms |
コンパイル使用メモリ | 12,928 KB |
実行使用メモリ | 11,008 KB |
最終ジャッジ日時 | 2024-11-15 20:08:55 |
合計ジャッジ時間 | 2,008 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 | 30 ms
10,752 KB |
testcase_01 | AC | 30 ms
10,752 KB |
testcase_02 | AC | 30 ms
10,752 KB |
testcase_03 | AC | 30 ms
10,752 KB |
testcase_04 | AC | 31 ms
10,624 KB |
testcase_05 | AC | 30 ms
10,752 KB |
testcase_06 | AC | 30 ms
10,752 KB |
testcase_07 | AC | 30 ms
10,752 KB |
testcase_08 | AC | 30 ms
10,752 KB |
testcase_09 | AC | 30 ms
10,752 KB |
testcase_10 | AC | 31 ms
10,880 KB |
testcase_11 | AC | 30 ms
10,880 KB |
testcase_12 | AC | 30 ms
10,880 KB |
testcase_13 | AC | 30 ms
10,752 KB |
testcase_14 | AC | 30 ms
10,624 KB |
testcase_15 | WA | - |
testcase_16 | AC | 30 ms
10,880 KB |
testcase_17 | WA | - |
testcase_18 | AC | 30 ms
10,752 KB |
testcase_19 | WA | - |
testcase_20 | AC | 29 ms
10,752 KB |
testcase_21 | AC | 30 ms
10,752 KB |
testcase_22 | AC | 30 ms
10,880 KB |
testcase_23 | AC | 30 ms
10,752 KB |
testcase_24 | AC | 30 ms
10,880 KB |
testcase_25 | AC | 30 ms
10,752 KB |
testcase_26 | AC | 30 ms
10,752 KB |
testcase_27 | WA | - |
ソースコード
#!/usr/bin/env python3 import enum NUM_POINTS = 5 EPS = 1e-10 class PointsRelation(enum.Enum): counter_clockwise = 1 clockwise = 2 online_back = 3 on_segment = 4 online_front = 5 def inner_product(v1, v2): return v1.real * v2.real + v1.imag * v2.imag def outer_product(v1, v2): return v1.real * v2.imag - v1.imag * v2.real def project(a, b): return a * inner_product(a, b) / (abs(a) ** 2) def points_relation(p0, p1, p2): v1 = p1 - p0 v2 = p2 - p0 op = outer_product(v1, v2) if op > EPS: return PointsRelation.counter_clockwise elif op < -EPS: return PointsRelation.clockwise elif inner_product(v1, v2) < -EPS: return PointsRelation.online_back elif abs(v1) < abs(v2): return PointsRelation.online_front else: return PointsRelation.on_segment def in_place_convex_hull_andrew(ps): def judge(p0, p1, p2): b = points_relation(p0, p1, p2) != PointsRelation.counter_clockwise b &= points_relation(p0, p1, p2) != PointsRelation.online_front return b if len(ps) < 3: return ps ps.sort(key=lambda p: p.imag) n = len(ps) k = 0 ch = [None for _ in range(2 * n)] for i in range(n): while k >= 2 and judge(ch[k - 2], ch[k - 1], ps[i]): k -= 1 ch[k] = ps[i] k += 1 t = k + 1 for i in range(n - 1)[::-1]: while k >= t and judge(ch[k - 2], ch[k - 1], ps[i]): k -= 1 ch[k] = ps[i] k += 1 ch = ch[:k - 1] return ch def main(): ps = [complex(*map(float, input().split())) for _ in range(NUM_POINTS)] ch = in_place_convex_hull_andrew(ps) print("YES" if len(ch) == NUM_POINTS else "NO") if __name__ == '__main__': main()