Hints 01

What is STDIN and STDOUT?

In Java this is System.in and System.out.

Perfect Travelers 1

Searching all of the possibilities can be slow when there are a lot of them. Divisors come in pairs.

Pipe Pals

Many causes of problems here.

• Get Java to tell you the character codes.

    char c = 'A';
    int cn = (int) c;
  

• Scanner will read a blank string if you use nextLine() after the last integer on a line.

• Read the Constraints section to see what size numbers and input strings you need to be prepared to handle.