#B. 计算等边三角形使用的火柴根数量(拓展01-输入边长)

    Type: Default 1000ms 256MiB

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])

image

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

Not Attended
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
Partic.
2