#A. 练24.2+1 for循环求和

    Type: Default 1000ms 256MiB

练24.2+1 for循环求和

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说明

利用for循环。计算输出1+2+3+...+n1+2+3+...+n的和。

输入格式

输入nn。对于100%的数据,1n1001≤n≤100

输出格式

如题述,之和。

样例

10
55

第一节课比赛

Not Attended
Status
Done
Rule
ACM/ICPC
Problem
4
Start at
2025-2-9 17:30
End at
2025-2-15 12:30
Duration
139 hour(s)
Host
Partic.
4