結果
問題 | No.283 スライドパズルと魔方陣 |
ユーザー | maspy |
提出日時 | 2020-05-03 16:03:06 |
言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
結果 |
AC
|
実行時間 | 513 ms / 2,000 ms |
コード長 | 3,154 bytes |
コンパイル時間 | 200 ms |
コンパイル使用メモリ | 13,312 KB |
実行使用メモリ | 45,052 KB |
最終ジャッジ日時 | 2024-06-12 20:06:28 |
合計ジャッジ時間 | 23,450 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 489 ms
44,412 KB |
testcase_01 | AC | 485 ms
44,408 KB |
testcase_02 | AC | 481 ms
45,052 KB |
testcase_03 | AC | 499 ms
44,280 KB |
testcase_04 | AC | 482 ms
44,924 KB |
testcase_05 | AC | 478 ms
44,668 KB |
testcase_06 | AC | 483 ms
44,664 KB |
testcase_07 | AC | 474 ms
44,532 KB |
testcase_08 | AC | 475 ms
44,404 KB |
testcase_09 | AC | 477 ms
44,664 KB |
testcase_10 | AC | 477 ms
44,536 KB |
testcase_11 | AC | 481 ms
44,532 KB |
testcase_12 | AC | 482 ms
44,636 KB |
testcase_13 | AC | 467 ms
44,788 KB |
testcase_14 | AC | 477 ms
44,664 KB |
testcase_15 | AC | 497 ms
44,920 KB |
testcase_16 | AC | 501 ms
44,408 KB |
testcase_17 | AC | 472 ms
44,664 KB |
testcase_18 | AC | 475 ms
44,800 KB |
testcase_19 | AC | 479 ms
44,284 KB |
testcase_20 | AC | 466 ms
44,920 KB |
testcase_21 | AC | 478 ms
44,412 KB |
testcase_22 | AC | 480 ms
44,808 KB |
testcase_23 | AC | 481 ms
44,664 KB |
testcase_24 | AC | 482 ms
44,412 KB |
testcase_25 | AC | 485 ms
44,536 KB |
testcase_26 | AC | 492 ms
44,920 KB |
testcase_27 | AC | 513 ms
44,788 KB |
testcase_28 | AC | 507 ms
44,796 KB |
testcase_29 | AC | 503 ms
44,924 KB |
testcase_30 | AC | 503 ms
44,792 KB |
testcase_31 | AC | 504 ms
44,920 KB |
testcase_32 | AC | 512 ms
44,796 KB |
testcase_33 | AC | 503 ms
44,916 KB |
testcase_34 | AC | 488 ms
44,532 KB |
testcase_35 | AC | 489 ms
44,672 KB |
testcase_36 | AC | 490 ms
44,540 KB |
testcase_37 | AC | 502 ms
44,536 KB |
testcase_38 | AC | 490 ms
44,800 KB |
ソースコード
import sys import numpy as np read = sys.stdin.buffer.read readline = sys.stdin.buffer.readline readlines = sys.stdin.buffer.readlines def f(N): if N % 4 == 0: return f0(N) elif N % 4 == 2: return f2(N) else: return f13(N) def f13(N): A = np.zeros((N, N), np.int32) x = 0 y = N // 2 for i in range(1, N * N + 1): if A[x][y]: x += 2 y -= 1 x %= N y %= N A[x, y] = i x -= 1 y += 1 x %= N y %= N return A def f0(N): A = np.arange(N * N).reshape(N, N) A[1::4, 0::4] *= -1 A[1::4, 3::4] *= -1 A[2::4, 0::4] *= -1 A[2::4, 3::4] *= -1 A[0::4, 1::4] *= -1 A[0::4, 2::4] *= -1 A[3::4, 1::4] *= -1 A[3::4, 2::4] *= -1 A[A < 0] += N * N - 1 A += 1 return A def f2(N): A = f(N // 2) A = np.repeat(A, 2, axis=0).repeat(2, axis=1) A = (A - 1) * 4 n = N // 4 # L-type A[:2 * n + 2:2, ::2] += 4 A[:2 * n + 2:2, 1::2] += 1 A[1:2 * n + 2:2, ::2] += 2 A[1:2 * n + 2:2, 1::2] += 3 # U-type A[2 * n + 2, ::2] += 1 A[2 * n + 2, 1::2] += 4 A[2 * n + 3, ::2] += 2 A[2 * n + 3, 1::2] += 3 # X-type A[2 * n + 4::2, ::2] += 1 A[2 * n + 4::2, 1::2] += 4 A[2 * n + 5::2, ::2] += 3 A[2 * n + 5::2, 1::2] += 2 # modify center A[2 * n, 2 * n] -= 3 A[2 * n, 2 * n + 1] += 3 A[2 * n + 2, 2 * n] += 3 A[2 * n + 2, 2 * n + 1] -= 3 return A N = int(readline()) A = np.array(read().split()).reshape(N, N).astype(np.int32) def check(A, B): N = A.shape[0] A = A.ravel() B = B.ravel() Ax, Ay = np.divmod(np.argmax(A), N) Bx, By = np.divmod(np.argmax(B), N) pos_A = np.empty_like(A) pos_A[A] = np.arange(N * N) B = pos_A[B] inv = 0 for i, x in enumerate(B): inv += np.sum(B[:i] > x) dist = abs(Ax - Bx) + abs(Ay - By) return (inv - dist) % 2 == 0 def solve(A): N = A.shape[0] if N == 1: return A if N == 2: return None if N == 3: B = f(N) - 1 if check(A, B): return B else: return B[::-1] if N % 2 == 0: B = f(N) - 1 if check(A, B): return B else: return B[::-1] if N % 3 != 0: # 完全方陣 x = np.arange(N) B0 = np.add.outer(x, 2 * x) % N B1 = B0.T B = N * B0 + B1 if check(A, B): return B return np.roll(B, 1, axis=0) # N は 3 の倍数 M = N // 3 C = (f(M) - 1) * 9 D = f(3) - 1 B = np.empty_like(A) for i in range(3): for j in range(3): B[i::3, j::3] = C + D[i, j] if check(A, B): return B x, y = divmod(np.argmax(C), M) temp = B[3 * x, 3 * y:3 * y + 3].copy() B[3 * x, 3 * y:3 * y + 3] = B[3 * x + 2, 3 * y:3 * y + 3] B[3 * x + 2, 3 * y:3 * y + 3] = temp return B A[A == 0] = N * N A -= 1 B = solve(A) if B is None: print('impossible') else: print('possible') B += 1 print('\n'.join(' '.join(row) for row in B.astype(str)))