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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. 		int n=sc.nextInt();
  15. 		int a[]=new int[n];
  16. 		for(int i=0;i<n;i++)
  17. 		a[i]=sc.nextInt();
  18.  
  19. 		//suffix array to maintain max ele after a[j] in range j+1.....n-1
  20. 		int suffix[]=new int[n];
  21. 		suffix[n-1]=a[n-1];
  22.  
  23. 		for(int i=n-2;i>=0;i--)
  24. 		suffix[i]=Math.max(a[i],suffix[i+1]);
  25.  
  26. 		/*we dont need prefix array , we can maintain it using variable to see,
  27. 		the min ele in range 0....j-1
  28. 		*/
  29.  
  30.  
  31. 		int prefix=a[0];
  32.  
  33. 		boolean flag=false;
  34. 		for(int j=1;j<n-1;j++)
  35. 		{
  36. 			if(prefix<a[j] && a[j]<suffix[j+1])
  37. 			{
  38. 				// System.out.println("true");
  39. 				flag=true;
  40. 				break;
  41.  
  42. 			}
  43. 			else
  44. 			//updating prefix to maintain track of min element
  45. 			prefix=Math.min(prefix,a[j]);
  46. 		}
  47.  
  48.  
  49.  
  50. 		if(flag)
  51. 		System.out.println("true");
  52. 		else
  53. 		System.out.println("false");
  54.  
  55.  
  56. 	}
  57. }
Success #stdin #stdout 0.14s 54452KB
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https://ideone.com/oOF25S
language:
Java (HotSpot 12)
created:
9 hours ago
visibility:
public

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