Could you provide an example in your problem statement? Also, as Evan says below, you should have more than one test case or it becomes a trivial matter to hard-code a particular answer.
Probably should add a couple more test cases so that silly people like me don't submit answers like this. ;)
Count up then down
Penny flipping - calculate winning probability (easy)
Number of digits in an integer
What number has this problem?
Swap two numbers
letter yes yes & letter no no
Size of this cup?
Tell me the slope
Check if sorted
peta to nano (x-ray)
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