Equilateral triangle

The input for the program consists of three natural numbers, a, b, and c, provided on a single line and separated by spaces. The output should be the square of any of these numbers if they can form an equilateral triangle with side lengths a, b, and c. If they cannot form such a triangle, the output should be the message No.

Input

Three natural numbers a, b, and c, each separated by a space on a single line.

Output

The solution to the problem.

Examples