結果
| 問題 |
No.245 貫け!
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-31 17:33:32 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 117 ms / 5,000 ms |
| コード長 | 1,044 bytes |
| コンパイル時間 | 215 ms |
| コンパイル使用メモリ | 82,188 KB |
| 実行使用メモリ | 71,036 KB |
| 最終ジャッジ日時 | 2025-03-31 17:34:07 |
| 合計ジャッジ時間 | 2,557 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 16 |
ソースコード
n = int(input())
segments = []
points = []
for _ in range(n):
a, b, c, d = map(int, input().split())
segments.append(((a, b), (c, d)))
points.append((a, b))
points.append((c, d))
max_count = 0
for i in range(len(points)):
for j in range(i + 1, len(points)):
p1 = points[i]
p2 = points[j]
if p1 == p2:
continue
# Compute line equation ax + by + c = 0
a_coeff = p1[1] - p2[1]
b_coeff = p2[0] - p1[0]
c_coeff = p1[0] * p2[1] - p2[0] * p1[1]
current = 0
for seg in segments:
(x3, y3), (x4, y4) = seg
v3 = a_coeff * x3 + b_coeff * y3 + c_coeff
v4 = a_coeff * x4 + b_coeff * y4 + c_coeff
if v3 == 0 or v4 == 0:
current += 1
elif (v3 < 0 and v4 > 0) or (v3 > 0 and v4 < 0):
current += 1
if current > max_count:
max_count = current
# Also check all lines that are exactly the line of a segment (handled by endpoints)
print(max_count)
lam6er