View Code of Problem 1

import java.io.Scanner;

public class Main {
  public static void main(String[] args) {
	Scanner in = new Scanner(System.in);
    	int a = in.nextInt();
    	int b = in.nextInt();
    in.close();
    System.out.println(a + b);
  }
}
/*
Main.java:1: error: cannot find symbol
import java.io.Scanner;
              ^
  symbol:   class Scanner
  location: package java.io
Main.java:5: error: cannot find symbol
	Scanner in = new Scanner(System.in);
	^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
	Scanner in = new Scanner(System.in);
	                 ^
  symbol:   class Scanner
  location: class Main
3 errors
*/