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Welcome back. In this week's Way of the Programmer lesson,

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we'll be encouraging a habit of drawing reference diagrams and offer some tips

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on how to recognize when to use the accumulation pattern and how to do it well.

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The learning objectives: at the end of this lesson,

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you should have developed the habit of drawing

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a reference diagram to resolve any potential confusions.

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And you should be able to recognize when you should use

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the accumulation pattern based on

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the words that are in the problem statement. See you at the end.