#2068. C++-GESP 2023-09认证二级-选择题14（拓展）
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ID: 2068
Type: Default
1000ms
256MiB
Tried: 6
Accepted: 6
Difficulty: 10
Uploaded By:
wuzehong
C++-GESP 2023-09认证二级-选择题14（拓展）
Background
Description
Format
Input
Output
Samples
9
1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
1 2 3 4 5 4 3 2 1
1 2 3 4 5 6 5 4 3 2 1
1 2 3 4 5 6 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1
Limitation
1s, 1024KiB for each test case.