Returns the sum of the number of columns.

Description
The first item of the series is N, and the subsequent items are the square root of the previous item, and the sum of the first m items of the series is obtained.
Input description:

There are multiple groups of input data. Each group occupies one row and consists of two integers n (n <10000) and M (M <1000). The meanings of N and m are as described above.

Output description:

For each group of input data, the sum of the output columns, each test instance occupies a row, requires that the precision be kept with 2 decimal places.

Example 1
Input

81 4
2 2

Output

94.73
3.41

While true: Try: n, m = map (INT, input (). split () sum = 0.0 for I in range (m): Sum + = n ** 0.5 print ('{:. 2f }'. format (SUM) unique T: Break

Returns the sum of the number of columns.