Function names cannot begin with a number. Also, this is an extremely simple problem that has been posted many times. Please put more thought into problems before posting them.
I changed the problem slightly and added some more test cases.
Leading size is 0 !!!!!!!!!!!!
it's very easy
leading solution is zero ,what does this mean?
Add two numbers
Sum of diagonal of a square matrix
Relative ratio of "1" in binary number
Volume and area of a sphere
Draw a 'Z'.
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