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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone {
  9. 	public static void main (String[] args) throws java.lang.Exception {
  10. 		int[] array = {1,8,3,2,4,5,9,7,8,1,0,4,5,6};
  11. 		StringBuilder sb = new StringBuilder("" + array[0]);
  12. 		String sequence = "";
  13. 		int count = 1;
  14. 		int maxCount = 1;
  15.  
  16. 		for (int i=1; i < array.length; i++) {
  17. 		    if (array[i] == array[i-1] + 1) {
  18.         		count++;
  19. 		        sb.append(",").append(array[i]);
  20. 		    }
  21.     		if (array[i] != array[i-1] + 1 || i == array.length - 1) {
  22. 		        if (count > maxCount) {
  23. 		            maxCount = count;
  24.         		    sequence = sb.toString();
  25. 		        }
  26.         		count = 1;
  27. 		        sb = new StringBuilder("" + array[i]);
  28. 		    }
  29. 		}
  30.  
  31. 		System.out.println("The longest sequence was " + sequence + ", with a length of: " + maxCount);
  32. 	}
  33. }
Success #stdin #stdout 0.12s 36696KB
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stdin
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Standard input is empty
stdout
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The longest sequence was 4,5,6, with a length of: 3
https://ideone.com/WfFeby
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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