Runtime error / Exception in thread "main" java.util.NoSuchElementException

[trilok01]

Everytime when I give custom input to the code, it successfully gives the right result. But when I run the code without custom input it shows Runtime Error everytime.
This is my code

Here is the screenshot of output:

[ssjgz]

New to Codechef. Can't understand the platform

One thing that trips up all people migrating from Hackerrank (hello :)) is that clicking “Run” (not “Submit”) here on Codechef does not run your code with the sample testcases - instead, it runs it with empty input (so attempts to read anything from stdin will fail, or give weird values). If you click “Run”, you must provide Custom Input.

[hackraj]

please provide custom input before clicking RUN button.

[trilok01]

Thanks for helping me out. I didn’t knew how “Run” and “Submit” works here.