Kattis Challenge "Line Them Up"

 1import java.util.ArrayList;
 2import java.util.Scanner;
 3
 4public class KattisA {
 5
 6    public static void main(String[] args) {
 7
 8        Scanner sc = new Scanner(System.in);
 9        int N = sc.nextInt();
10
11        boolean incr = false;
12        boolean decr = false;
13
14        ArrayList<String> al = new ArrayList();
15
16        for (int i = 0; i <= N; i++) {
17            al.add(sc.nextLine());
18        }
19
20        for (int i = 1; i < al.size() - 1; i++) {
21
22            //Increasing
23            if (al.get(i).charAt(0) < al.get(i + 1).charAt(0)) {
24                incr = true;
25            }
26            //Decreasing
27            if (al.get(i).charAt(0) > al.get(i + 1).charAt(0)) {
28                decr = true;
29            }
30
31            //If the first characters are equal, check the next character
32            if (al.get(i).charAt(0) == al.get(i + 1).charAt(0)) {
33                //Increasing
34                if (al.get(i).charAt(1) < al.get(i + 1).charAt(1)) {
35                    incr = true;
36                }
37                //Decreasing
38                if (al.get(i).charAt(1) > al.get(i + 1).charAt(1)) {
39                    decr = true;
40                }
41            }
42
43        }
44
45        if (decr && !incr) {
46            System.out.println("DECREASING");
47        } else if (!decr && incr) {
48            System.out.println("INCREASING");
49        } else if ((incr && decr) || (!incr & !decr)) {
50            System.out.println("NEITHER");
51        }
52
53    }
54}