結果
| 問題 |
No.2036 Max Middle
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 13:57:32 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,184 bytes |
| コンパイル時間 | 145 ms |
| コンパイル使用メモリ | 82,244 KB |
| 実行使用メモリ | 279,284 KB |
| 最終ジャッジ日時 | 2025-06-12 13:57:48 |
| 合計ジャッジ時間 | 4,192 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 4 TLE * 1 -- * 12 |
ソースコード
import sys
from collections import deque
def main():
n = int(sys.stdin.readline())
A = list(map(int, sys.stdin.readline().split()))
if n < 3:
print(0)
return
is_peak = [False] * n
q = deque()
for i in range(1, n-1):
if A[i-1] < A[i] and A[i] > A[i+1]:
is_peak[i] = True
q.append(i)
count = 0
while q:
i = q.popleft()
if not is_peak[i]:
continue
# Perform the operation
min_val = min(A[i-1], A[i+1])
A[i] = min_val - 1
count += 1
is_peak[i] = False # Current position is no longer a peak
# Check surrounding positions for new peaks
for j in [i-1, i, i+1]:
if j < 1 or j >= n-1:
continue
# Check if j is a peak now
if A[j-1] < A[j] and A[j] > A[j+1]:
if not is_peak[j]:
is_peak[j] = True
q.append(j)
else:
if is_peak[j]:
is_peak[j] = False # In case it was marked as peak before
print(count)
if __name__ == "__main__":
main()
gew1fw