#1679. C++-循环for-输入n（整数），求出1~n(含)之间的整数的和并输出
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ID: 1679
Type: Default
1000ms
256MiB
Tried: 25
Accepted: 8
Difficulty: 7
Uploaded By:
wuzehong
C++-循环for-输入n（整数），求出1~n(含)之间的整数的和并输出
Background
Description
C++-循环for-输入n（整数），求出1~n(含)之间的整数的和并输出
Format
Input
Output
Samples
100
5050
-20
-209
Limitation
1s, 1024KiB for each test case.