結果
問題 |
No.2328 Build Walls
|
ユーザー |
![]() |
提出日時 | 2025-07-10 02:35:11 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 1,339 bytes |
コンパイル時間 | 385 ms |
コンパイル使用メモリ | 82,340 KB |
実行使用メモリ | 171,484 KB |
最終ジャッジ日時 | 2025-07-10 02:35:28 |
合計ジャッジ時間 | 15,703 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 * 3 |
other | AC * 19 TLE * 2 -- * 13 |
ソースコード
from collections import defaultdict, deque from heapq import heappush, heappop def neighbors8(r: int, c: int) -> list[tuple[int, int]]: res = [] for dr in range(-1, 2): for dc in range(-1, 2): if abs(dr) + abs(dc) == 0: continue nr = r + dr nc = c + dc res.append((nr, nc)) return res INF = 1 << 60 H, W = map(int, input().split()) A = [] for i in range(H): if i == 0 or i == H-1: A.append([INF] * W) else: A.append(list(map(int, input().split()))) starts = [] goals = [] for r in range(1, H): starts.append((r, -1)) goals.append((r, W)) q = [] for r, c in starts: heappush(q, (0, r, c)) costs = defaultdict(lambda: 0) for i in range(H): for j in range(W): c = A[i][j] costs[i, j] = c if c != -1 else INF dists = defaultdict(lambda: INF) while q: d, r, c = heappop(q) if dists[r, c] <= d: continue dists[r, c] = d if r < -1 or r > H: continue if c < -1 or c > W: continue for nr, nc in neighbors8(r, c): if nr in (0, H-1): continue if costs[nr, nc] == INF: continue nd = d + costs[nr, nc] if dists[nr, nc] <= nd: continue heappush(q, (nd, nr, nc)) ans = min(dists[r, c] for r, c in goals) if ans == INF: print(-1) else: print(ans)