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  1. import java.io.File;
  2. import java.io.FileNotFoundException;
  3. import java.util.Scanner;
  4.  
  5. public class Main {
  6. 	public static void main(String[] args) throws FileNotFoundException {
  7. 		Scanner input = new Scanner(System.in);
  8. 		String[] parts;
  9.  
  10. 		while (input.hasNextLine()) {
  11. 			parts = input.nextLine().split(";");
  12.  
  13. 			System.out.println(
  14. 				findIntersection(parts[0].split(","), parts[1].split(","))
  15. 			);
  16. 		}
  17. 	}
  18.  
  19. 	private static String findIntersection(String[] arr1, String[] arr2) {
  20. 	    StringBuilder result = new StringBuilder();
  21. 	    int val1 = Integer.parseInt(arr1[0]);
  22. 	    int val2 = Integer.parseInt(arr2[0]);
  23.  
  24. 	    for (int i = 0, j = 0; ; ) {
  25. 	        if (val1 == val2) {
  26. 	            result.append(',').append(val1);
  27.  
  28. 	            if (++i < arr1.length) {
  29. 	            	val1 = Integer.parseInt(arr1[i]);
  30. 	            } else {
  31. 	            	break;
  32. 	            }
  33.  
  34. 	            if (++j < arr2.length) {
  35. 	            	val2 = Integer.parseInt(arr2[j]);
  36. 	            } else {
  37. 	            	break;
  38. 	            }
  39. 	        } else if (val1 < val2) {
  40. 	        	if (++i < arr1.length) {
  41. 	            	val1 = Integer.parseInt(arr1[i]);
  42. 	            } else {
  43. 	            	break;
  44. 	            }
  45. 	        } else {
  46. 	            if (++j < arr2.length) {
  47. 	            	val2 = Integer.parseInt(arr2[j]);
  48. 	            } else {
  49. 	            	break;
  50. 	            }
  51. 	        }
  52.     	}
  53.  
  54. 	    return result.length() == 0 ? "" : result.substring(1);
  55. 	} 
  56. }
Success #stdin #stdout 0.13s 321088KB
comments (?)
stdin
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9,10,11;33,34,35
3,7,8,22;11,22
11,12,13,14;14,15,16
20,21,22;45,46,47
77,78,79;78,79,80,81,82
33,35;3,18,26,35
stdout
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22
14

78,79
35
https://ideone.com/zqnqY1
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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