URI 1156:: SOLUTION

URI Online Judge | 1156

S Sequence II

Write an algorithm to calculate and write the value of S, S being given by:
S = 1 + 3/2 + 5/4 + 7/8 + ... + 39/?

Input

There is no input in this problem.

Output

The output contains a value corresponding to the value of S.
The value should be printed with two digits after the decimal point.

Input Sample	Output Sample

[WAIT]

     First of all, think yourself that you have tried enough for the problem. If you did not please read the program once. REMEMBER one thing, just believe in yourself.....YOU CAN.....YOU KNOW....

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