To solve this exercise you will need the definitions and the procedures of problems P46254 and P84786.

Write a procedure that reads a point:

which is in the input with the two reals *x* and *y* in this order.

Write also a procedure that reads a circle:

which is in the input with the three reals
*x*, *y*, and *radius* in this order.

Use all this to write a program that reads a circle *c*
and an initial point *p*,
and moves *p* according to the input,
and prints when *p* go in or go out of *c*.
Suppose that *p* will never be exactly in the border of *c*.

**Input**

Input starts with a line with the circle *c*
(three reals, the last one strictly positive)
and a line with the point *p* (two reals).
Then a natural number *n* comes
followed by *n* lines,
each one with a point that indicates the following move of *p*.

**Output**

Your program must print the initial situation of *p* regard to *c*,
and the moments that the point goes in or goes out of the circle.
Follow the format of the examples.

Public test cases

**Input**

0 0 4.5 1 1 5 10 1 0 0 -10 -1 0.5 0.5 0 -20

**Output**

initially inside in the step 1 has gone out in the step 3 has gone in in the step 5 has gone out

**Input**

5 10 2.5 2 2 3 -1 -1 -1 -1 -1 -1

**Output**

initially outside

Information

- Author
- Salvador Roura
- Language
- English
- Translator
- Carlos Molina
- Original language
- Catalan
- Other languages
- Catalan
- Official solutions
- C++
- User solutions
- C++