結果
| 問題 |
No.2179 Planet Traveler
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 18:49:33 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,603 bytes |
| コンパイル時間 | 309 ms |
| コンパイル使用メモリ | 82,584 KB |
| 実行使用メモリ | 91,056 KB |
| 最終ジャッジ日時 | 2025-03-20 18:51:28 |
| 合計ジャッジ時間 | 5,289 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 14 WA * 12 |
ソースコード
import math
import heapq
def main():
N = int(input())
X = []
Y = []
T = []
r_i = []
for _ in range(N):
x, y, t = map(int, input().split())
X.append(x)
Y.append(y)
T.append(t)
r = math.hypot(x, y)
r_i.append(r)
# Precompute distance matrix
d_matrix = [[0.0] * N for _ in range(N)]
for i in range(N):
for j in range(N):
if i == j:
d_matrix[i][j] = 0.0
else:
if T[i] == T[j]:
dx = X[i] - X[j]
dy = Y[i] - Y[j]
d = math.hypot(dx, dy)
else:
d = abs(r_i[i] - r_i[j])
d_matrix[i][j] = d
d_matrix[j][i] = d # since undirected
# Dijkstra's algorithm to find minimal maximum edge
INF = float('inf')
dist = [INF] * N
dist[0] = 0.0
heap = []
heapq.heappush(heap, (0.0, 0))
while heap:
current_max, u = heapq.heappop(heap)
if u == N - 1:
# Compute the square and round to integer
print(int(round(current_max ** 2)))
return
if current_max > dist[u]:
continue
for v in range(N):
if v == u:
continue
new_max = max(current_max, d_matrix[u][v])
if new_max < dist[v]:
dist[v] = new_max
heapq.heappush(heap, (new_max, v))
# If no path found (but problem states there is a path)
print(0)
if __name__ == "__main__":
main()
lam6er