Print that root

In mathematics, a square root of a number a is a number y such that y2 = a, in other words, a number y whose square (the result of multiplying the number by itself, or y * y) is a. For example, 4 and -4 are square roots of 16 because 42 = (-4)2 = 16.

Every positive integer has a unique non-negative square root, called the principal square root, which is denoted by √a, where √ is called the radical sign or radix. For example, the principal square root of 9 is 3, denoted √9 = 3, because 32 = 3 * 3 = 9 and 3 is non-negative. The term whose root is being considered is known as the radicand. The radicand is the number or expression underneath the radical sign, in this example 9.

Input

A single positive integer smaller than or equal to 2147483647.

Output

The principal square root of the input integer. Print the result with two digits precision. See sample output for details.

Input

456682

Sample output

√456682 = 675.78