Did the Big O analysis and added checkpoint. Also had to rearrange cards. Another thing to note is that some of the algorithms were using recursion, and I had a hard time giving a reason for the big O without mention the recursion tree method, so the explanations might not be great :(
@reviewer/mxthu313
Closes #494
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Changes proposed in this pull request:
Did the Big O analysis and added checkpoint. Also had to rearrange cards. Another thing to note is that some of the algorithms were using recursion, and I had a hard time giving a reason for the big O without mention the recursion tree method, so the explanations might not be great :( @reviewer/mxthu313