#3002. C++-输入n（正整数），求出1~n(含)的和并输出
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ID: 3002
Type: Default
1000ms
256MiB
Tried: 43
Accepted: 25
Difficulty: 3
Uploaded By:
paifuture
C++-输入n（正整数），求出1~n(含)的和并输出
Background
Description
输入n（正整数），求出1~n(含)的和并输出
Format
Input
Output
Samples
100
5050
10
55
5
15
Limitation
1s, 1024KiB for each test case.