Hi myjinxin2015. Was just trying this on Kotlin, and it seems there's something wrong with the unit tests.

I had several attempts and saved the following values, that were expected to be "true", but are actually "false":
[4, 0, 8, 0, 8, 0, 0, 0, 9, 3, 0, 0, 0, 3, 4, 0, 0, 2, 3]
[7, 0, 5, 0, 0, 6, 8, 0, 0, 0, 4, 5, 0, 0, 4]
[2, 0, 1, 0, 0, 0, 4, 0, 3, 0, 0, 0, 2]
[9, 0, 6, 0, 0, 0, 0, 3, 0, 0, 6, 7, 1, 0, 0]
[8, 6, 5, 3, 4, 0, 0, 0, 0, 9, 0, 0, 0, 9, 6, 0, 0, 0, 0, 0, 0, 6, 0, 0, 6, 6, 0]
[0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 4]
[4, 2, 0, 8, 0, 8, 0, 0, 0, 8, 9, 7, 5, 8, 0, 0, 6, 5, 9, 0, 0, 1, 5, 7, 0, 0, 5, 6, 6]

Hope you could look into this.

Thanks!

Hahaha! Tried to avoid brute force as well, but alas, it's the only way I could get it right.

Tried doing it without recursion.

Didn't know you could iterate through a string that way. We learn something new everyday! :)

Good job sir!

Very clear and concise approach! Should have thought of that.

Thank you! :)

Hi! I'm running into this error:

Testing for [-76, 86, -51, 7, 64, -71, 97, 25, 17, 98, 50, 2, 75, -2, -59, 39, 86, -65, 77, 92]
It should work with random inputs too - Expected: 1.9863952136289137e+21, instead got: 4365703766217393700

Is this a bug? I've checked the output on an online LCM calculator and we both have the same answer. (http://www.calculator.net/lcm-calculator.html?numberinputs=98%2C97%2C92%2C86%2C77%2C76%2C75%2C71%2C65%2C64%2C59%2C51%2C50%2C39%2C25%2C17%2C7%2C2&x=94&y=9)

This is a really nice kata, and I really would like to finish it. Please let me know if there was just a bug in the test case. Thanks!