Interface for geometric shapes

Go Medium interfaces

Task «Interface for geometric shapes»

Implement the Shape interface, which contains the Area() float64 method. Create the Circle and Rectangle structures that implement this interface. For a circle, the area is calculated as π * r^2, for a rectangle — a * b. Then write a function PrintArea(s Shape) that prints the area of the shape with an accuracy of two decimal places. Input data: shape type (1 — circle, 2 — rectangle) and the corresponding parameters (radius for a circle, sides a and b for a rectangle). Output the area of the shape.

Input Format

First line: an integer t (1 ≤ t ≤ 100) — the number of shapes. For each shape: the first line is an integer type (1 or 2). If type=1, the next line contains one real number — the radius. If type=2, the next line contains two real numbers — sides a and b.

Output Format

For each shape, output its area with an accuracy of two decimal places, each on a new line.

Examples

Example 1

INPUT

1
0

OUTPUT

1

Example 2

INPUT

4
ADD Task A 1
ADD Task B 4
COMPLETE Task C
PENDING

OUTPUT

Task not found
Task B, Task A

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