#1294. 求1+2+3.+...
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ID: 1294
Type: Default
1000ms
256MiB
Tried: 10
Accepted: 9
Difficulty: 9
Uploaded By:
求1+2+3.+...
Description
用递归的方法求$1+2+3+……+N$的值。
Input Format
输入$N$。
Output Format
输出和。
5
15
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