# Divide and Conquer

Here is a quick introduction to the divide and conquer paradigm!

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## Divide and conquer method

Divide and conquer is an algorithmic paradigm in which the problem is *repeatedly* divided into subproblems until we reach a point where each problem is **similar and atomic** (i.e., can’t be further divided).

### Atomic problem

Let’s solve a problem in which we have a list of uppercase and lowercase alphabets and the task is to convert it all into lowercase.

In this problem, we will start solving these atomic problems and combining (merging) the solutions. So, Divide and Conquer solutions have the following 3 steps:

#### 1. Divide

First, break the problem at hand into smaller subproblems. This step can be achieved by dividing the list containing the alphabets into sublists until a single unit is left and no further division is possible.

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