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Problem J: 编程求1+3+5+...+n
Problem J: 编程求1+3+5+...+n
[Creator :
]
Time Limit :
1.000
sec
Memory Limit :
16 MiB
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ProblemList
Solved: 193
Submit Num: 287
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Description
编程求1+3+5+...+n
Input
输入一行,只有一个整数n (1<=n<=9999) 这里n为奇数。
Output
输出只有一行
Sample Input
Copy
99
Sample Output
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2500