結果
問題 |
No.3129 Multiple of Twin Subarray
|
ユーザー |
|
提出日時 | 2025-05-01 16:09:39 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
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実行時間 | 344 ms / 2,000 ms |
コード長 | 1,423 bytes |
コンパイル時間 | 385 ms |
コンパイル使用メモリ | 82,448 KB |
実行使用メモリ | 231,396 KB |
最終ジャッジ日時 | 2025-05-01 16:09:51 |
合計ジャッジ時間 | 11,455 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 46 |
ソースコード
import heapq from itertools import accumulate N=int(input()) A=list(map(int, input().split())) to_right=list(accumulate(A)) to_left=list(accumulate(A[::-1]))[::-1] if N == 2: print(A[0]*A[1]) exit() leftM=[] rightM=[] leftm=[] rightm=[] heapq.heapify(leftM) heapq.heapify(rightM) heapq.heapify(leftm) heapq.heapify(rightm) mem1=[A[0]] mem2=[A[0]] rmem1=[A[-1]] rmem2=[A[-1]] heapq.heappush(leftM, -A[0]) heapq.heappush(rightM, -A[-1]) heapq.heappush(leftm, A[0]) heapq.heappush(rightm, A[-1]) for i in range(1,N-1): mem1.append(max(to_right[i]-leftm[0], to_right[i])) mem2.append(min(to_right[i]+leftM[0],to_right[i])) heapq.heappush(leftM, -to_right[i]) heapq.heappush(leftm, to_right[i]) for i in range(-2,-N,-1): rmem1.append(max(to_left[i]-rightm[0], to_left[i])) rmem2.append(min(to_left[i]+rightM[0], to_left[i])) heapq.heappush(rightM, -to_left[i]) heapq.heappush(rightm, to_left[i]) to_rightmax = list(accumulate(mem1, lambda x,y: max(x,y))) to_rightmin = list(accumulate(mem2, lambda x,y: min(x,y))) to_leftmax = list(accumulate(rmem1, lambda x,y: max(x,y)))[::-1] to_leftmin = list(accumulate(rmem2, lambda x,y: min(x,y)))[::-1] ans=0 for i in range(N-1): ans = max(ans, to_rightmax[i]*to_leftmax[i]) ans = max(ans, to_rightmax[i]*to_leftmin[i]) ans = max(ans, to_rightmin[i]*to_leftmax[i]) ans = max(ans, to_rightmin[i]*to_leftmin[i]) print(ans)