結果
| 問題 |
No.2366 登校
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 18:16:12 |
| 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 | 246 ms |
| コンパイル使用メモリ | 82,264 KB |
| 実行使用メモリ | 129,292 KB |
| 最終ジャッジ日時 | 2025-06-12 18:16:43 |
| 合計ジャッジ時間 | 7,496 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 * 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()
gew1fw