結果
| 問題 |
No.340 雪の足跡
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-15 23:39:57 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,332 bytes |
| コンパイル時間 | 328 ms |
| コンパイル使用メモリ | 82,392 KB |
| 実行使用メモリ | 100,044 KB |
| 最終ジャッジ日時 | 2025-04-15 23:42:19 |
| 合計ジャッジ時間 | 5,618 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 * 5 |
| other | AC * 15 TLE * 1 -- * 16 |
ソースコード
import sys
from collections import deque
def main():
W, H, N = map(int, sys.stdin.readline().split())
east_edges = [[False] * (W - 1) for _ in range(H)]
north_edges = [[False] * W for _ in range(H - 1)]
for _ in range(N):
M_i = int(sys.stdin.readline())
B = list(map(int, sys.stdin.readline().split()))
for j in range(M_i):
B_prev = B[j]
B_current = B[j + 1]
h_prev = B_prev // W
w_prev = B_prev % W
h_current = B_current // W
w_current = B_current % W
if h_prev == h_current:
# Horizontal movement
start_w = min(w_prev, w_current)
end_w = max(w_prev, w_current)
for w in range(start_w, end_w):
east_edges[h_prev][w] = True
else:
# Vertical movement
start_h = min(h_prev, h_current)
end_h = max(h_prev, h_current)
for h in range(start_h, end_h):
north_edges[h][w_prev] = True
# BFS initialization
visited = [[-1 for _ in range(W)] for _ in range(H)]
q = deque()
q.append((0, 0))
visited[0][0] = 0
target_h = H - 1
target_w = W - 1
while q:
h, w = q.popleft()
current_dist = visited[h][w]
if h == target_h and w == target_w:
print(current_dist)
return
# Check east direction
if w < W - 1 and east_edges[h][w]:
if visited[h][w + 1] == -1:
visited[h][w + 1] = current_dist + 1
q.append((h, w + 1))
# Check west direction
if w > 0 and east_edges[h][w - 1]:
if visited[h][w - 1] == -1:
visited[h][w - 1] = current_dist + 1
q.append((h, w - 1))
# Check north direction
if h < H - 1 and north_edges[h][w]:
if visited[h + 1][w] == -1:
visited[h + 1][w] = current_dist + 1
q.append((h + 1, w))
# Check south direction
if h > 0 and north_edges[h - 1][w]:
if visited[h - 1][w] == -1:
visited[h - 1][w] = current_dist + 1
q.append((h - 1, w))
print("Odekakedekinai..")
if __name__ == "__main__":
main()
lam6er