programming-challenges/challenges/offset-arrays/README.md

# offset-arrays

Created by [@theoludwig](https://github.com/theoludwig) on 29 June 2021.

## Instructions

### Goal

To settle the debate of 0-based vs 1-based indexing I have created a language where you must explicitly state the range of indices an array should have.

For example, given an array definition "A[-1..1] = 1 2 3", you would have:

- A[-1] = 1
- A[0] = 2
- A[1] = 3

You are given a list of `n` array definitions and your job is to figure out what number is found in a given index `i` of an array `arr`. Note that the indexing operations may be nested (in the above example, A[A[-1]] would produce result 3).

### Input

- **Line 1:** An integer `n` for the number of array assignments
- **`n` next lines:** One array assignment per line: `array_identifier` [ `first_index` .. `last_index` ] = `last_index - first_index + 1` integers separated by space
- **Line `n+2`:** Element to print: `arr` [ `i` ]

### Constraints

- 1 <= `n` <= 100
- Array names consist only of uppercase letters A to Z
- Array lengths are between 1 and 100 (no empty arrays)
- Indexing operations have at most 50 levels of nesting
- Indices are always within bounds in the test cases

## Source

- [CodinGame](https://www.codingame.com/ide/puzzle/offset-arrays)

## Examples

See the `test` folder for examples of input/output.

### Example 1

#### Input

```txt
3
A[-1..1] = 1 2 3
B[3..7] = 3 4 5 6 7
C[-2..1] = 1 2 3 4
A[0]
```

#### Output

```txt
2
```