#T. 练24.2 循环求和

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练24.2 循环求和

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说明

利用for、while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，1≤n≤1001≤n≤100。

输出格式

如题述，之和。

样例

10
55

20251012编程挑战精英赛训练

Not Attended
Status
Done
Rule
ACM/ICPC
Problem
51
Start at
2025-9-24 15:00
End at
2025-11-5 7:00
Duration
1000 hour(s)
Host
Partic.
58
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