exeption in java

Question

https://code.sololearn.com/c3wu75ie3XdI/#java

in this code there is an exeption
can someone fix it?

Answer 1

Use only one Scanner.
Scanner a = new Scanner(System.in);
Scanner b = new Scanner(System.in);
...
int aa = a.nextInt();
int bb = b.nextInt();
....
|
V
Scanner a = new Scanner(System.in);
int aa = a.nextInt();
int bb = a.nextInt();
....