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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. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc = new Scanner(System.in);
  14. 		PrintWriter out = new PrintWriter(System.out,true);
  15. 		int n = sc.nextInt();
  16. 		long[] arr = new long[n];
  17. 		for(int i =0;i<n;i++){
  18. 			arr[i] = sc.nextLong();
  19. 		}
  20. 		long[] diff = new long[n];
  21. 	    for(int i = 1;i<n;i++){
  22. 	    	diff[i] = arr[i]-arr[i-1];
  23. 	    	//out.println(diff[i]);
  24. 	    }
  25. 	    int l = 0,mLen = 1;
  26. 	    long lastseen = 0;
  27. 	    for(int i =1;i<n;i++){
  28. 	    	if(Math.abs(diff[i]) <= 1){
  29. 	    		if(diff[i] == lastseen && diff[i]!= 0){
  30. 	    			l = i-1;
  31. 	    			lastseen = diff[i];
  32. 	    		//	out.println("CASE 1");
  33. 	    		//	out.println(l);
  34. 	    		}
  35. 	    		else if(diff[i] != lastseen || (diff[i] == 0)){
  36. 	    			if(i-l+1 > mLen){
  37. 	    				mLen = i-l+1;
  38. 	    			}
  39. 	    			if(diff[i]!=0){
  40. 	    				lastseen = diff[i];
  41. 	    			}
  42. 	    		//	out.println("CASE 2");
  43. 	    		//	out.println(diff[i]);
  44. 	    		}
  45. 	    	}
  46. 	    	else{
  47. 	    		l = i-1;
  48. 	    	}
  49. 	    //	out.println(l);
  50. 	    }
  51. 	    out.println(mLen);
  52. 	}
  53. }
Success #stdin #stdout 0.16s 321344KB
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https://ideone.com/UI8BZZ
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

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