結果
| 問題 | No.3504 Insert Maze |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2026-04-18 10:40:24 |
| 言語 | PyPy3 (7.3.17) |
| 結果 |
AC
|
| 実行時間 | 1,756 ms / 2,000 ms |
| コード長 | 2,152 bytes |
| 記録 | |
| コンパイル時間 | 289 ms |
| コンパイル使用メモリ | 84,992 KB |
| 実行使用メモリ | 418,688 KB |
| 最終ジャッジ日時 | 2026-04-18 10:41:32 |
| 合計ジャッジ時間 | 54,244 ms |
|
ジャッジサーバーID (参考情報) |
judge3_1 / judge2_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 85 |
ソースコード
# snippet: templete_
# Last Modified: 2026-02-13
from collections import deque, defaultdict
from itertools import permutations, product
from bisect import bisect_left, bisect_right
from heapq import heappush, heappop
from random import randint, shuffle
from time import perf_counter as pc
def II(): return int(input())
def LI(): return list(map(int,input().split()))
def LI_1(): return [int(x) - 1 for x in input().split()]
def SI(): return input()
def LS(): return list(input().split())
mod = 998244353
inf = 1001001001001001001
import sys
sys.setrecursionlimit(10 ** 6)
input = lambda: sys.stdin.readline().rstrip()
_buf = []
def print(*a, **k): _buf.append(" ".join(map(str, a)))
D = [(1, 0), (-1, 0), (0, 1), (0, -1)]
def solve():
H, W = LI()
S = [SI() for _ in range(H)]
dp = [[inf] * W for _ in range(H)]
dp[0][0] = 0
ptr = 0
g = [[] for _ in range(2 * H + 2 * W + 1)]
g[0].append((0, 0))
while ptr < H + W + 1:
for i, j in g[ptr]:
if dp[i][j] < ptr:
continue
for di, dj in D:
ni, nj = i + di, j + dj
if 0 <= ni < H and 0 <= nj < W:
if S[ni][nj] == "#":
nc = ptr + 2
if dp[ni][nj] > nc:
dp[ni][nj] = nc
g[nc].append((ni, nj))
ni += di; nj += dj
while 0 <= ni < H and 0 <= nj < W:
nc += 1
if dp[ni][nj] > nc:
dp[ni][nj] = nc
g[nc].append((ni, nj))
ni += di; nj += dj
else:
nc = ptr + 1
if dp[ni][nj] > nc:
dp[ni][nj] = nc
g[nc].append((ni, nj))
ptr += 1
assert dp[-1][-1] != inf
print(dp[-1][-1])
return
if __name__ == "__main__":
T = 1
# T = II()
for _ in range(T):
solve()
sys.stdout.write("\n".join(_buf) + "\n")