import java.util.Scanner;
import java.util.Random;

class Exam2 {

	public static void main(String[] args) {

		System.out.println("Hello World!");

		Scanner kb = new Scanner(System.in);

		System.out.println("Please enter an integer");
		int num = kb.nextInt();
		if (num % 2 == 0) {
			System.out.println("even");
		}
		else {
			System.out.println("odd");
		}
		System.out.println();
		
		System.out.println("Please enter a string");
		String str = kb.next();

		boolean flag = (str.length() > 5) ? true : false;
		System.out.println(flag);

		num = 10;
		while(num <= 20) {
			System.out.print(num + " ");
			num++;
		}
		System.out.println();	

		for(int i = 10; i <= 20; i++) {
			System.out.print(i + " ");
		}
		System.out.println();	
		
		int[] array1 = {1, 2, 3, 4, 5};

		int[] array2 = array1;
		
		for(int i = 0; i < array2.length; i++) {
			System.out.print(array2[i] + " ");
		}
		System.out.println();

		int[] array3 = array2;
		
		for(int i = 0; i < array3.length; i++) {
			array3[i] = array3[i] * 2;
		}

		int[][] matrix1 = new int[5][5];

		Random rand = new Random();
		for(int i = 0; i < 5; i++) {
			for(int j = 0; j < 5; j++) {
				matrix1[i][j] = rand.nextInt();
			}
		}

		int[][] matrix2 = matrix1;

		int sum = 0;
		for(int i = 0; i < matrix2.length; i++) {
			sum += matrix2[i][1];
		}

		int[][] matrix3 = matrix2;

		for(int i = 0; i < matrix3.length; i++) {
			for(int j = 0; j < matrix3[i].length; j++) {
				matrix3[i][j] = -1;
			}
		}

		System.out.println("please enter two integers");
		int num1 = kb.nextInt();
		int num2 = kb.nextInt();
		
		int total = sum(num1, num2);
		System.out.println("sum: " + total);		 

	}

	public static int sum(int a, int b) {
		return a + b;
	}
}