結果
| 問題 |
No.484 収穫
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 18:48:37 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,489 bytes |
| コンパイル時間 | 418 ms |
| コンパイル使用メモリ | 82,356 KB |
| 実行使用メモリ | 540,760 KB |
| 最終ジャッジ日時 | 2025-03-20 18:50:24 |
| 合計ジャッジ時間 | 24,702 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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')
dp = [[[INF] * 2 for _ in range(n)] for __ in range(n)]
# Initialize for single-cell intervals
for i in range(n):
dp[i][i][0] = A[i]
dp[i][i][1] = A[i]
# Process intervals of increasing length
for length in range(1, n):
for l in range(n - length):
r = l + length
# Check if we can extend to the left (to l)
# From the right end of [l+1][r]
candidate_left_from_right = dp[l+1][r][1] + (r - l)
new_time = max(candidate_left_from_right, A[l])
if new_time < dp[l][r][0]:
dp[l][r][0] = new_time
# From the left end of [l+1][r]
candidate_left_from_left = dp[l+1][r][0] + 1
new_time = max(candidate_left_from_left, A[l])
if new_time < dp[l][r][0]:
dp[l][r][0] = new_time
# Check if we can extend to the right (to r)
# From the left end of [l][r-1]
candidate_right_from_left = dp[l][r-1][0] + (r - l)
new_time = max(candidate_right_from_left, A[r])
if new_time < dp[l][r][1]:
dp[l][r][1] = new_time
# From the right end of [l][r-1]
candidate_right_from_right = dp[l][r-1][1] + 1
new_time = max(candidate_right_from_right, A[r])
if new_time < dp[l][r][1]:
dp[l][r][1] = new_time
# The answer is the minimum of the two possible end states for the full interval [0, n-1]
print(min(dp[0][n-1][0], dp[0][n-1][1]))
lam6er