結果
問題 | No.273 回文分解 |
ユーザー | Coki628 |
提出日時 | 2020-05-27 23:34:49 |
言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
結果 |
AC
|
実行時間 | 34 ms / 2,000 ms |
コード長 | 2,096 bytes |
コンパイル時間 | 239 ms |
コンパイル使用メモリ | 12,928 KB |
実行使用メモリ | 11,008 KB |
最終ジャッジ日時 | 2024-10-13 03:54:07 |
合計ジャッジ時間 | 2,277 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 32 ms
10,880 KB |
testcase_01 | AC | 31 ms
10,880 KB |
testcase_02 | AC | 29 ms
10,880 KB |
testcase_03 | AC | 30 ms
10,880 KB |
testcase_04 | AC | 30 ms
10,752 KB |
testcase_05 | AC | 30 ms
10,752 KB |
testcase_06 | AC | 32 ms
10,880 KB |
testcase_07 | AC | 31 ms
11,008 KB |
testcase_08 | AC | 32 ms
10,880 KB |
testcase_09 | AC | 29 ms
10,880 KB |
testcase_10 | AC | 29 ms
10,752 KB |
testcase_11 | AC | 33 ms
11,008 KB |
testcase_12 | AC | 30 ms
10,752 KB |
testcase_13 | AC | 30 ms
10,880 KB |
testcase_14 | AC | 32 ms
11,008 KB |
testcase_15 | AC | 29 ms
11,008 KB |
testcase_16 | AC | 30 ms
10,752 KB |
testcase_17 | AC | 29 ms
11,008 KB |
testcase_18 | AC | 29 ms
11,008 KB |
testcase_19 | AC | 30 ms
10,752 KB |
testcase_20 | AC | 29 ms
10,880 KB |
testcase_21 | AC | 29 ms
11,008 KB |
testcase_22 | AC | 33 ms
11,008 KB |
testcase_23 | AC | 34 ms
11,008 KB |
testcase_24 | AC | 33 ms
10,880 KB |
testcase_25 | AC | 34 ms
10,880 KB |
testcase_26 | AC | 33 ms
11,008 KB |
testcase_27 | AC | 34 ms
10,752 KB |
testcase_28 | AC | 33 ms
11,008 KB |
testcase_29 | AC | 34 ms
10,880 KB |
testcase_30 | AC | 34 ms
10,880 KB |
testcase_31 | AC | 30 ms
10,752 KB |
testcase_32 | AC | 29 ms
10,752 KB |
testcase_33 | AC | 30 ms
11,008 KB |
testcase_34 | AC | 30 ms
10,880 KB |
ソースコード
import sys def input(): return sys.stdin.readline().strip() def list2d(a, b, c): return [[c] * b for i in range(a)] def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)] def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)] def ceil(x, y=1): return int(-(-x // y)) def INT(): return int(input()) def MAP(): return map(int, input().split()) def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)] def Yes(): print('Yes') def No(): print('No') def YES(): print('YES') def NO(): print('NO') sys.setrecursionlimit(10 ** 9) INF = 10 ** 19 MOD = 10 ** 9 + 7 EPS = 10 ** -10 def Manacher(S): """ Manacher(文字iを中心とする最長の回文の半径を返す):O(N) """ N = len(S) R = [0] * N i = j = 0 while i < N: while i-j >= 0 and i+j < N and S[i-j] == S[i+j]: j += 1 R[i] = j k = 1 while i-k >= 0 and i+k < N and k+R[i-k] < j: R[i+k] = R[i-k] k += 1 i += k j -= k return R def Manacher_even(_S): """ Manacher偶数長(文字iとi+1の間を中心とする最長の回文の半径を返す):O(N) """ _N = len(_S) S = [] for i in range(_N-1): S.append(_S[i]) S.append('$') S.append(_S[-1]) N = len(S) R = [0] * N i = j = 0 while i < N: while i-j >= 0 and i+j < N and S[i-j] == S[i+j]: j += 1 R[i] = j k = 1 while i-k >= 0 and i+k < N and k+R[i-k] < j: R[i+k] = R[i-k] k += 1 i += k j -= k res = [0] * (_N-1) j = 0 for i in range(1, N, 2): res[j] = R[i] // 2 j += 1 return res def get_max(S): res1 = Manacher(S) res2 = Manacher_even(S) res = 0 for a in res1: a = a*2 - 1 res = max(res, a) for a in res2: a *= 2 res = max(res, a) return res S = input() N = len(S) ans = 0 for i in range(1, N): ans = max(ans, get_max(S[:i]), get_max(S[i:])) print(ans)