結果
問題 | No.437 cwwゲーム |
ユーザー |
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提出日時 | 2025-03-20 18:39:58 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 65 ms / 2,000 ms |
コード長 | 1,618 bytes |
コンパイル時間 | 155 ms |
コンパイル使用メモリ | 82,772 KB |
実行使用メモリ | 73,528 KB |
最終ジャッジ日時 | 2025-03-20 18:40:02 |
合計ジャッジ時間 | 3,573 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 41 |
ソースコード
import sys from collections import defaultdict n = input().strip() s = list(n) L = len(s) if L < 3: print(0) sys.exit() # Generate all possible valid triples (i, j, k) with i < j < k and forms a cww number triples = [] for i in range(L): for j in range(i+1, L): for k in range(j+1, L): a, b, c = s[i], s[j], s[k] if a == b or b != c or a == '0': continue value = int(a + b + c) triples.append((i, j, k, value)) if not triples: print(0) sys.exit() full_mask = (1 << L) - 1 dp = [-sys.maxsize] * (1 << L) dp[full_mask] = 0 # Initial state: all digits available, score 0 # Group masks by the number of set bits and process them in descending order masks_by_bits = defaultdict(list) for mask in range(1 << L): cnt = bin(mask).count('1') masks_by_bits[cnt].append(mask) # Sort the keys in descending order to process masks with most bits first sorted_bit_counts = sorted(masks_by_bits.keys(), reverse=True) for bit_count in sorted_bit_counts: for mask in masks_by_bits[bit_count]: if dp[mask] == -sys.maxsize: continue # Check all valid triples for i, j, k, val in triples: if (mask & (1 << i)) and (mask & (1 << j)) and (mask & (1 << k)): new_mask = mask ^ ((1 << i) | (1 << j) | (1 << k)) if dp[new_mask] < dp[mask] + val: dp[new_mask] = dp[mask] + val # The maximum score is the maximum value in dp, or 0 if no triples were chosen max_score = max([x for x in dp if x != -sys.maxsize] + [0]) print(max_score)