Problem 980. Unique values without using UNIQUE function

What is Size?

Size refers to the number of nodes in a parse tree. Generally speaking, you can think of size as code length.
34Size
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Solution 252684 Submitted on 1 Jun 2013 at 20:12 by Paul Berglund 
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Incorrect
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Solution 245607 Submitted on 17 May 2013 
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Incorrect
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Solution 245606 Submitted on 17 May 2013 
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Incorrect
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Solution 245605 Submitted on 17 May 2013 
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24Size
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Solution 237792 Submitted on 29 Apr 2013 by Yaroslav 
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Incorrect
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Solution 237791 Submitted on 29 Apr 2013 
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Incorrect
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Solution 237790 Submitted on 29 Apr 2013 
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Incorrect
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Solution 237789 Submitted on 29 Apr 2013 
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34Size
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Solution 201197 Submitted on 6 Feb 2013 by Claudio Gelmi 
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Incorrect
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Solution 201196 Submitted on 6 Feb 2013 
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35Size
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Solution 201190 Submitted on 6 Feb 2013 by Claudio Gelmi 
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Incorrect
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Solution 199671 Submitted on 2 Feb 2013 
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Incorrect
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Solution 199670 Submitted on 2 Feb 2013 
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Incorrect
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Solution 189933 Submitted on 11 Jan 2013 
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Incorrect
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Solution 189932 Submitted on 11 Jan 2013 
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31Size
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Solution 184834 Submitted on 3 Jan 2013 by Alfonso Nieto-Castanon 
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43Size
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Solution 184069 Submitted on 1 Jan 2013 by Mehmet 
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48Size
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Solution 182522 Submitted on 28 Dec 2012 by Duane Hanselman 
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Incorrect
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Solution 182521 Submitted on 28 Dec 2012 
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Incorrect
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Solution 181566 Submitted on 26 Dec 2012 
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Incorrect
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Solution 181565 Submitted on 26 Dec 2012 
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Incorrect
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Solution 167091 Submitted on 22 Nov 2012 
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30Size
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Solution 167087 Submitted on 22 Nov 2012 by Andrei Bobrov 
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Incorrect
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Solution 167073 Submitted on 22 Nov 2012 
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44Size
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Solution 162318 Submitted on 15 Nov 2012 by José Ramón Menzinger 
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34Size
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Solution 159087 Submitted on 7 Nov 2012 by Venu Lolla 
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Incorrect
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Solution 159086 Submitted on 7 Nov 2012 
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Incorrect
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Solution 158186 Submitted on 6 Nov 2012 
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Incorrect
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Solution 158184 Submitted on 6 Nov 2012 
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38Size
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Solution 153499 Submitted on 24 Oct 2012 by Binbin Qi 
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50Size
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Solution 151766 Submitted on 19 Oct 2012 by David Hruska 
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48Size
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Solution 149947 Submitted on 17 Oct 2012 by Robert 
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43Size
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Solution 149827 Submitted on 17 Oct 2012 by Petr 
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Incorrect
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Solution 149823 Submitted on 17 Oct 2012 
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33Size
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Solution 148453 Submitted on 15 Oct 2012 by Vitaly Lavrukhin 
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42Size
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Solution 146570 Submitted on 10 Oct 2012 by @bmtran 
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47Size
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Solution 146534 Submitted on 10 Oct 2012 by James 
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Incorrect
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Solution 146533 Submitted on 10 Oct 2012 
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42Size
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Solution 146488 Submitted on 10 Oct 2012 by Jean-Marie SAINTHILLIER 
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25Size
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Solution 146398 Submitted on 10 Oct 2012 by Khaled Hamed 
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29Size
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Solution 146397 Submitted on 10 Oct 2012 by Khaled Hamed 
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32Size
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Solution 146396 Submitted on 10 Oct 2012 by Khaled Hamed 
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33Size
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Solution 146395 Submitted on 10 Oct 2012 by Khaled Hamed 
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34Size
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Solution 146393 Submitted on 10 Oct 2012 by Khaled Hamed 
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45Size
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Solution 146362 Submitted on 10 Oct 2012 by Tim 
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49Size
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Solution 146230 Submitted on 9 Oct 2012 by Khaled Hamed 
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37Size
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Solution 146229 Submitted on 9 Oct 2012 by Richard Zapor 
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35Size
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Solution 146227 Submitted on 9 Oct 2012 by Richard Zapor 
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38Size
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Solution 146224 Submitted on 9 Oct 2012 by Richard Zapor 
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37Size
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Solution 146093 Submitted on 9 Oct 2012 by Dan 
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