[CHALLENGE] How to get the longest substring which length more than one of one String.welcome to resolve.

Question

how to get the longest substring which length more than one of String.output substring and times of repetition of substring.if there are no substring then output NONO.
eg.
"5555"=>"555" :2
"aabbcc"=>NONO
"abcabcertert"=>
abc:2
ert:2

https://www.sololearn.com/discuss/1157975/?ref=app

Answer 1

This was a very nice challenge Thanks
https://code.sololearn.com/cOhjKy89v0As/?ref=app

Answer 2

Mr Louis's answer is perfect.Thank you.I have implemented it by java.
https://code.sololearn.com/c8E3HP00x2wE/?ref=app

Answer 3

html js java come on pls

Answer 4

that is a very good question

Answer 5

thank you for your opinion