結果
問題 | No.484 収穫 |
ユーザー |
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提出日時 | 2025-04-16 00:08:44 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,628 bytes |
コンパイル時間 | 197 ms |
コンパイル使用メモリ | 81,868 KB |
実行使用メモリ | 541,212 KB |
最終ジャッジ日時 | 2025-04-16 00:10:07 |
合計ジャッジ時間 | 23,210 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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') # Initialize DP table 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(1, n): for l in range(1, n - length + 1): r = l + length # Case 1: Extend to the left from the left end of [l+1, r] if l + 1 <= r: current = dp[l+1][r][0] time = current + 1 harvest = max(time, a[l-1]) if harvest < dp[l][r][0]: dp[l][r][0] = harvest # Case 2: Extend to the left from the right end of [l+1, r] if l + 1 <= r: current = dp[l+1][r][1] steps = (r - (l+1)) + 1 # Steps from right end of [l+1, r] to l time = current + steps harvest = max(time, a[l-1]) if harvest < dp[l][r][0]: dp[l][r][0] = harvest # Case 3: Extend to the right from the left end of [l, r-1] if r - 1 >= l: current = dp[l][r-1][0] steps = (r-1 - l) + 1 # Steps from left end of [l, r-1] to r time = current + steps harvest = max(time, a[r-1]) if harvest < dp[l][r][1]: dp[l][r][1] = harvest # Case 4: Extend to the right from the right end of [l, r-1] if r - 1 >= l: current = dp[l][r-1][1] time = current + 1 harvest = max(time, a[r-1]) if harvest < dp[l][r][1]: dp[l][r][1] = harvest result = min(dp[1][n][0], dp[1][n][1]) print(result)