333 - Perimeter II

Perimeter II

Time Limit: 1 sec

**The Problem**

Suppose you are standing in a **Square** room. There is a 45 degree angle **line** is drawn. The **Length** of the **Diagonal** is given. Can you tell me what the **Perimeter** of that room is?

Note: The **Perimeter** of a **Square** is **4 * Length of one side of square.**

**The Input**

The input file contains a series of line. Each line contains an integer number length of drawn **Line** of that room, **X (X <= 9999)**. Input is terminated by EOF

**The Output**

For each line of input the output will show the **Perimeter **of the room rounded to 2 decimal points.

**Sample Input**

625

225

12

**Sample Output**

1767.77

636.40

33.94

Problem Setter: Samia Safa Ahmed