結果
問題 |
No.2366 登校
|
ユーザー |
![]() |
提出日時 | 2025-06-12 12:56:13 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,925 bytes |
コンパイル時間 | 479 ms |
コンパイル使用メモリ | 82,188 KB |
実行使用メモリ | 130,504 KB |
最終ジャッジ日時 | 2025-06-12 13:01:59 |
合計ジャッジ時間 | 8,217 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 11 WA * 11 TLE * 1 -- * 2 |
ソースコード
import sys from collections import deque def main(): input = sys.stdin.read().split() idx = 0 N = int(input[idx]); idx +=1 M = int(input[idx]); idx +=1 K = int(input[idx]); idx +=1 T_val = int(input[idx]); idx +=1 mysterious = [] for _ in range(K): A = int(input[idx])-1; idx +=1 # 0-based B = int(input[idx])-1; idx +=1 C = int(input[idx]); idx +=1 D = int(input[idx]); idx +=1 mysterious.append((A, B, D)) # Compute minimal steps from (0,0) to (N-1, M-1) dirs = [(-1,0), (1,0), (0,-1), (0,1)] def bfs(start_x, start_y, target_x, target_y): visited = [[-1 for _ in range(M)] for __ in range(N)] q = deque() q.append((start_x, start_y)) visited[start_x][start_y] = 0 while q: x, y = q.popleft() if x == target_x and y == target_y: return visited[x][y] for dx, dy in dirs: nx = x + dx ny = y + dy if 0 <= nx < N and 0 <= ny < M and visited[nx][ny] == -1: visited[nx][ny] = visited[x][y] + 1 q.append((nx, ny)) return -1 # unreachable S = bfs(0, 0, N-1, M-1) if S == -1: print(-1) return if S <= T_val: print(0) return # Need to use time rewinds. Check if any mysterious square is on any path. min_D = None for (A, B, D) in mysterious: # Check if (A,B) is reachable from start steps1 = bfs(0, 0, A, B) if steps1 == -1: continue # Check if end is reachable from (A,B) steps2 = bfs(A, B, N-1, M-1) if steps2 == -1: continue if min_D is None or D < min_D: min_D = D if min_D is None: print(-1) else: k = S - T_val print(k * min_D) if __name__ == '__main__': main()