### Challenge for Basic Recursion

### Challenge

You will be given a positive integer `a`

. Fill in the method `doStuff`

so that it adds up all the positive integers up to `a`

and returns the sum. For example, when given `4`

it should return `10`

(4+3+2+1).

While there are other ways to solve this challenge, you should use recursion to get the sum.

(Raw Input Note: The first line contains N, the number of cases, and N lines follow, which each contain a single integer.)

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