結果
問題 | No.484 収穫 |
ユーザー |
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提出日時 | 2025-04-16 00:10:12 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,298 bytes |
コンパイル時間 | 260 ms |
コンパイル使用メモリ | 81,428 KB |
実行使用メモリ | 525,908 KB |
最終ジャッジ日時 | 2025-04-16 00:11:16 |
合計ジャッジ時間 | 24,413 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 WA * 1 |
other | AC * 9 MLE * 12 |
ソースコード
n = int(input()) a = list(map(int, input().split())) INF = float('inf') # Using 1-based indices for cells (1 to n) # dp[l][r][0] is the time when covering [l..r] ending at l # dp[l][r][1] is the time when covering [l..r] ending at r dp = [[[INF] * 2 for _ in range(n + 2)] for __ in range(n + 2)] for i in range(1, n + 1): dp[i][i][0] = a[i - 1] dp[i][i][1] = a[i - 1] for length in range(2, n + 1): for l in range(1, n - length + 2): r = l + length - 1 # Calculate dp[l][r][0] (ending at left end l) # Option 1: come from [l+1..r] ending at left (l+1) option1 = dp[l + 1][r][0] + 1 # Option 2: come from [l+1..r] ending at right (r) option2 = dp[l + 1][r][1] + (r - l) dp[l][r][0] = min(option1, option2) dp[l][r][0] = max(dp[l][r][0], a[l - 1]) # Ensure we can harvest at l # Calculate dp[l][r][1] (ending at right end r) # Option 1: come from [l..r-1] ending at right (r-1) option1 = dp[l][r - 1][1] + 1 # Option 2: come from [l..r-1] ending at left (l) option2 = dp[l][r - 1][0] + (r - l) dp[l][r][1] = min(option1, option2) dp[l][r][1] = max(dp[l][r][1], a[r - 1]) # Ensure we can harvest at r answer = min(dp[1][n][0], dp[1][n][1]) print(answer)