clover solution, i don't remember we can access to a char by charAt(), i always used it but i don't know how i forgot that. thanks for a new short way to solution.

👏🏻 your decode() is a thing of beauty

very smart

long one-liner which is not that easy to read. this good too

Nice touch.

Nested loop alters the outer loop counter so it 'fasts forward', it therefore does not cause combinatorial wasted effort.

Your code has ~4 extra conditionals so is unlikely to perform any better.

that's a clever way to do it :)

Is the type casting necessary or best practices?

but doesn't this give object error

i did the same thing but with for loop,and even tho for loop has less time complexity,it still got timed out,and i dropped this approach

can anyone explain why do the last return is 0?
i dont get why it works like that, thanks

https://www.w3schools.com/java/ref_string_replace.asp

Basic

Is it best practice to change the value of a variable in the while loop condition?