結果
| 問題 | No.2180 Comprehensive Line Segments |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-10-07 17:03:55 |
| 言語 | PyPy3 (7.3.17) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,388 bytes |
| 記録 | |
| コンパイル時間 | 383 ms |
| コンパイル使用メモリ | 82,116 KB |
| 実行使用メモリ | 351,260 KB |
| 最終ジャッジ日時 | 2024-11-17 00:59:11 |
| 合計ジャッジ時間 | 48,087 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | WA * 3 TLE * 1 |
| other | AC * 8 WA * 14 TLE * 3 |
ソースコード
from collections import defaultdict, deque
import sys
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2**63-1
mod = 998244353
import sys
from collections import deque
from fractions import Fraction as frac
input = sys.stdin.readline
INF = 10 ** 9
class Point:
def __init__(self, x: frac, y: frac):
self.x = x
self.y = y
def __eq__(self, other):
return (self.x == other.x and self.y == other.y)
def __hash__(self):
return hash((self.x, self.y))
def __lt__(self, other):
if(self.x == other.x):
return (self.y < other.y)
return (self.x < other.x)
def show(self):
print(self.x, self.y)
def calcLine(self, other):
x1 = self.x; y1 = self.y
x2 = other.x; y2 = other.y
if(x1 == x2):
return Line(frac(1), frac(0), x1)
a = (y1 - y2) / (x1 - x2)
c = y1 - a * x1
return Line(-a, frac(1), c)
class Line:
def __init__(self, a: frac, b:frac, c:frac):
self.a = a
self.b = b
self.c = c
def __eq__(self, other):
return (self.a == other.a and self.b == other.b and self.c == other.c)
def __hash__(self):
return hash((self.a, self.b, self.c))
def show(self):
print((self.a, self.b, self.c))
def intersection(self, other) -> Point:
p = self.a * other.b - other.a * self.b
if(p == frac(0)):
return None
q = other.b * self.c - self.b * other.c
x = q / p
y = (other.c - other.a * x) / other.b if(self.b == 0) else (self.c - self.a * x) / self.b
return Point(x, y)
n = ii()
XY = [li() for _ in range(n)]
dp = [[defaultdict(lambda:inf) for _ in range(n)] for _ in range(2**n)]
q = deque()
for i in range(n):
dp[2**i][i][(Line(-inf, -inf, -inf), 0)] = 0
q.append((2**i,i,(Line(-inf, -inf, -inf), 0)))
while q:
bit, now, l = q.popleft()
if bit == ((2**n) - 1):
print(dp[bit][now][l])
break
for to in range(n):
if now == to:
continue
l2 = (Point(*XY[now]).calcLine(Point(*XY[to])), XY[now] < XY[to])
if l == l2:
if dp[bit ^ (2**to)][to][l] > dp[bit][now][l]:
dp[bit^(2**to)][to][l] = dp[bit][now][l]
q.appendleft((bit^(2**to), to, l))
else:
if dp[bit ^ (2**to)][to][l2] > dp[bit][now][l] + 1:
dp[bit^(2**to)][to][l2] = dp[bit][now][l] + 1
q.append((bit^(2**to), to, l2))