Zzuli: sum of 1051 square roots

Title Description

The definition of sequence is as follows ：
The first term of the sequence is item, Later items are the square root of the previous item , Find the front of the sequence n Sum of items .

Input

By two integers item（item<10000） and n(n<1000) form ,item and n Has the meaning set forth above .

Output

Output the sum of the sequence , Occupy a line , Precision retention required 2 Decimal place .

The sample input  Copy

84 4

Sample output  Copy

97.93

#include <stdio.h>
#include <math.h>
int main()
{
	int n,i;
	double item,sum=0;
	scanf("%lf%d",&item,&n);
	for(i=1;i<=n;i++)
	{
		sum=sum+item;
		item=sqrt(item);
	}
	printf("%.2lf",sum);
	return 0;
}