A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99.
Find the largest palindrome made from the product of numbers less than or equal to the input number.
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Your last test case is accidentally all commented out, so isn't a real test case
The question is unclear. Do the factor-numbers all have to be two-digited?
@Jan-Andrea Bard, no.
Although it is not mentioned clearly in the problem statement but you can see a hint from the test suite
This problem would be really fun with larger test cases. It would eliminate kron() and stop naively checking every string combination.
@Brandon you could submit a new problem ("Palindromic Numbers - Hard Mode" or so).
Hello,
Just want to make a correction and make a clear problem statement. It is missing a multiplication sign.
"A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99."
Modified to be,
"A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 * 99."