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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
You could have use
if (i == 0 && expression.Split('=')[1].Count(c => c != '?') == 0) { continue; }
istead of
if ((expression.Contains("??")) && (i == 0)) { continue; }
That way it passes solveExpression("1?*1?=1??")
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This answer is wrong.
Example:
solveExpression("1?1?=1??") returns -1 although it should return 0 since 1010=100.
What about "5??*1?=5???" ?
Correct answer is 0 or i don't understand...
yes:
if ((expression.Contains("??")) && (i == 0)) { continue; }
This returns -1 instead of 0 for "1??*?=?".