public/subjects/hiddenp/README.md

## hiddenp

### Instructions

Write a program named `hiddenp` that takes two `strings` as arguments. The program should check if the first string `s1` is hidden in the second `s2`.
`s1` is considered hidden in `s2` if it is possible to find each character from `s1` in `s2`, in the same order as they appear in `s1`, but not necessarily consecutively.

- If `s1` is hidden in `s2`, the program should display `1` followed by a newline.
- If `s1` is not hidden in `s2`, the program should display `0` followed by a newline.
- If `s1` is an empty string, it is considered hidden in any string.
- If the number of arguments is different from 2, the program should display nothing.

### Usage

```console
$ go run . "fgex.;" "tyf34gdgf;'ektufjhgdgex.;.;rtjynur6" | cat -e
1$
$ go run . "abc" "2altrb53c.sse" | cat -e
1$
$ go run . "abc" "btarc" | cat -e
0$
$ go run . "DD" "DABC" | cat -e
0$
$ go run .
$
```