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

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# 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
```