I think I should have put directly return null below and return new int[]{j,i} inside the if, I forgot to remove the result variable, that way it continues executing the for when it has already found the solution.😅

Java Translation

The first two changes and the last one are done now, the third one now compares the user's response with the one I put in the answer method.

thank you for the correction

My error was the same and was solved by eliminating the use of the method substring