結果
問題 |
No.2354 Poor Sight in Winter
|
ユーザー |
![]() |
提出日時 | 2023-04-04 09:40:20 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 505 ms / 2,000 ms |
コード長 | 1,462 bytes |
コンパイル時間 | 365 ms |
コンパイル使用メモリ | 82,028 KB |
実行使用メモリ | 101,576 KB |
最終ジャッジ日時 | 2024-09-25 11:04:58 |
合計ジャッジ時間 | 6,540 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 26 |
ソースコード
import heapq def dijkstra(graph, v, dist, P): hq = [] heapq.heappush(hq, [0, v]) dist[v] = 0 while len(hq) > 0: min_d, cur = heapq.heappop(hq) if dist[cur] != min_d: continue for next_cur, next_d in graph[cur]: if dist[next_cur] > dist[cur] + (next_d + P - 1) // P - 1: dist[next_cur] = dist[cur] + (next_d + P - 1) // P - 1 heapq.heappush(hq, [dist[next_cur], next_cur]) N, K = map(int, input().split()) sx, sy, gx, gy = map(int, input().split()) graph = [[] for _ in range(N + 2)] X = [] Y = [] for i in range(N): x, y = map(int, input().split()) X.append(x) Y.append(y) for i in range(N): for j in range(N): if i != j: graph[i].append([j, abs(X[i] - X[j]) + abs(Y[i] - Y[j])]) for i in range(N): graph[N].append([i, abs(X[i] - sx) + abs(Y[i] - sy)]) graph[i].append([N, abs(X[i] - sx) + abs(Y[i] - sy)]) for i in range(N): graph[N + 1].append([i, abs(X[i] - gx) + abs(Y[i] - gy)]) graph[i].append([N + 1, abs(X[i] - gx) + abs(Y[i] - gy)]) graph[N].append([N + 1, abs(sx - gx) + abs(sy - gy)]) graph[N + 1].append([N, abs(sx - gx) + abs(sy - gy)]) INF = 10 ** 7 ng = 0 ok = 200002 while ok - ng > 1: center = (ok + ng) // 2 dist = [INF for _ in range(N + 2)] dijkstra(graph, N, dist, center) if dist[N + 1] <= K: ok = center else: ng = center #print(ok, ng) print(ok)