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public class SolveMeFist {
    static int solveMeFirst(int a, int b) {
        // Hint: Type return a+b; below
        return a + b;
    }
 
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a;
        a = in.nextInt();
        int b;
        b = in.nextInt();
        int sum;
        sum = solveMeFirst(a, b);
        System.out.println(sum);
    }
}

Main.java:3: error: class SolveMeFist is public, should be declared in a file named SolveMeFist.java
public class SolveMeFist {
       ^
Main.java:10: error: cannot find symbol
        Scanner in = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class SolveMeFist
Main.java:10: error: cannot find symbol
        Scanner in = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class SolveMeFist
3 errors

Standard output is empty