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求数列的和

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 168559    Accepted Submission(s): 99349


Problem Description
数列的定义如下:
数列的第一项为n,以后各项为前一项的平方根,求数列的前m项的和。
 

Input
输入数据有多组,每组占一行,由两个整数n(n<10000)和m(m<1000)组成,n和m的含义如前所述。
 

Output
对于每组输入数据,输出该数列的和,每个测试实例占一行,要求精度保留2位小数。
 

Sample Input
81 4 2 2
 

Sample Output
94.73 3.41
 

Author
lcy
 

Source
 

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