結果
| 問題 |
No.3121 Prime Dance
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-04-19 16:20:41 |
| 言語 | Python3 (3.13.1 + numpy 2.2.1 + scipy 1.14.1) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 2,261 bytes |
| コンパイル時間 | 308 ms |
| コンパイル使用メモリ | 12,800 KB |
| 実行使用メモリ | 11,648 KB |
| 最終ジャッジ日時 | 2025-04-19 16:20:44 |
| 合計ジャッジ時間 | 2,241 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | RE * 2 |
| other | RE * 21 |
ソースコード
from itertools import product
from collections import deque
# Generate prime numbers up to n
def generate_primes(n):
sieve = [True] * (n + 1)
sieve[0] = sieve[1] = False
for i in range(2, int(n**0.5) + 1):
if sieve[i]:
for j in range(i*i, n + 1, i):
sieve[j] = False
return [i for i, is_p in enumerate(sieve) if is_p]
# BFS to check if path is possible with exact A, B, C, D moves
def path_exists(grid, sx, sy, gx, gy, A, B, C, D):
H, W = len(grid), len(grid[0])
queue = deque()
queue.append((sx, sy, A, B, C, D))
visited = set()
visited.add((sx, sy, A, B, C, D))
while queue:
x, y, a, b, c, d = queue.popleft()
if (x, y) == (gx, gy) and a == b == c == d == 0:
return True
for dx, dy, use in [(1, 0, 'A'), (-1, 0, 'B'), (0, 1, 'C'), (0, -1, 'D')]:
nx, ny = x + dx, y + dy
if 0 <= nx < H and 0 <= ny < W and grid[nx][ny] != '#':
na, nb, nc, nd = a, b, c, d
if use == 'A' and na > 0: na -= 1
elif use == 'B' and nb > 0: nb -= 1
elif use == 'C' and nc > 0: nc -= 1
elif use == 'D' and nd > 0: nd -= 1
else: continue
state = (nx, ny, na, nb, nc, nd)
if state not in visited:
visited.add(state)
queue.append(state)
return False
def solve(H, W, Sx, Sy, Gx, Gy, grid):
Sx -= 1
Sy -= 1
Gx -= 1
Gy -= 1
dx = Gx - Sx
dy = Gy - Sy
primes = generate_primes(40)
min_ops = float('inf')
for A, B in product(primes, repeat=2):
if A - B != dx:
continue
for C, D in product(primes, repeat=2):
if C - D != dy:
continue
total_ops = A + B + C + D
if path_exists(grid, Sx, Sy, Gx, Gy, A, B, C, D):
min_ops = min(min_ops, total_ops)
return min_ops if min_ops != float('inf') else -1
# Input parsing
def main():
H, W = map(int, input().split())
Sx, Sy, Gx, Gy = map(int, input().split())
grid = [input().strip() for _ in range(H)]
print(solve(H, W, Sx, Sy, Gx, Gy, grid))
if __name__ == "__main__":
main()