Problem 972. Set a diagonal

What is Size?

Size refers to the number of nodes in a parse tree. Generally speaking, you can think of size as code length.
33Size
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Solution 144955 Submitted on 5 Oct 2012 by @bmtran 
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Incorrect
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Solution 144954 Submitted on 5 Oct 2012 
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Incorrect
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Solution 144950 Submitted on 5 Oct 2012 
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Incorrect
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Solution 144947 Submitted on 5 Oct 2012 
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Incorrect
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Solution 144938 Submitted on 5 Oct 2012 
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36Size
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Solution 144915 Submitted on 5 Oct 2012 by Nicholas Howe 
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