计算等边三角形使用的火柴根数量（拓展01-输入边长）
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Background
Description
计算等边三角形使用的火柴根数量（拓展01-输入边长[整数]）
Format
Input
Output
Samples
20
630
0
0
-1
error
Limitation
1s, 1024KiB for each test case.
计算等边三角形使用的火柴根数量
- Status
- Done
- Rule
- ACM/ICPC
- Problem
- 7
- Start at
- 2024-6-23 0:00
- End at
- 2024-7-8 0:00
- Duration
- 360 hour(s)
- Host
-
编创小匠 (paifuture)
- Partic.
- 2