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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 Problem11
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		Scanner in=new Scanner(System.in);
  13. 		int n;
  14. 		int b=0;
  15.  
  16. 		System.out.println("Enter no of elements");
  17. 		n=in.nextInt();
  18.  
  19. 		int[] arr=new int[n];
  20. 		System.out.println("Enter elements");
  21.  
  22. 		for(int i=0;i<n;i++)
  23. 		arr[i]=in.nextInt();
  24.  
  25. 		for(int i=0;i<n;i++){
  26.  
  27. 			for(int j=i+1;j<n;j++){
  28.  
  29. 				if(arr[i]==arr[j]){
  30.  
  31. 					System.out.println(+i);
  32. 					return;
  33. 				}
  34. 				else{
  35. 					if(arr[i]!=arr[j])
  36. 					b=1;
  37. 				}
  38.  
  39. 			}
  40.  
  41. 		}
  42. 		if(b==1)
  43. 		System.out.println("-1");
  44. 		else
  45. 		return;
  46. 	}
  47. }
Success #stdin #stdout 0.14s 52792KB
comments (?)
stdin
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7 1 5 3 4 3 5 6
stdout
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Enter no of elements
Enter elements
1
https://ideone.com/FN3Rt5
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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