Problem1533--简单递归-f(n)=1+2+3+4+···+n (n<=10000)

1533: 简单递归-f(n)=1+2+3+4+···+n (n<=10000)

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 234  Solved: 207
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Description

已知函数f(n)=1+2+3+4+···+n；(n<=10000)

输入n,求函数的值 



输入样例：10
输出样例：55

Source/Category

 提高B  
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