1KB

Give you an integer number n. Please find out the answer of the expression below.

Please note that the submission limit of this problem is 1KB.

Input

There are multiple test cases (No more than 100). Each test case contains a single integer n (1 <= n <= 100).

Output

For each test case, print the answer in a line. The number should be rounded into 100 decimal digits.

Sample Input

1
2
Sample Output

2.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
2.7071067811865475244008443621048490392848359376884740365883398689953662392310535194251937671638207864

https://stackoverflow.com/questions/23506956/given-an-integer-array-of-size-n-find-the-k-th-largest-element-without-sorting

I can't understand what you want to say.