UVa Online Judge Challenge "272"

 1import java.util.Scanner;
 2
 3public class Main {
 4
 5    public static void main(String[] args){
 6
 7        Scanner sc = new Scanner(System.in);
 8        
 9        boolean verticalMarks = false;
10        
11        while (sc.hasNextLine()) {
12
13            StringBuilder sb = new StringBuilder();
14
15            String input = sc.nextLine();
16
17            for (int i = 0; i < input.length(); i++) {
18                
19                if (input.charAt(i) == 34) {
20
21                    if (!verticalMarks) {
22
23                        sb.append("``");
24
25                        verticalMarks = true;
26
27                    } else if (verticalMarks) {
28                        
29                        sb.append("''");
30                        
31                        verticalMarks = false;
32
33                    }
34
35                } else {
36
37                    sb.append(input.charAt(i));
38
39                }
40
41            }
42
43            System.out.println(sb);
44
45        }
46
47    }
48
49}