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My solution to Q9 Find Duplicate in array using Java
pashmeen27
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Oct 31, 2020
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| Scanner s=new Scanner(System.in); | ||
| int n=s.nextInt(); | ||
| int arr[]=new int[n]; | ||
| for(int i=0;i<n;i++) | ||
| arr[i]=s.nextInt(); | ||
| findDuplicate(arr,n); |
pashmeen27
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Oct 31, 2020
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| HashMap<Integer,Integer> hm=new HashMap<Integer,Integer>(); | ||
| for(int i=0;i<n;i++) | ||
| { | ||
| if(!hm.containsKey(arr[i])) | ||
| hm.put(arr[i],1); | ||
| else if(hm.containsKey(arr[i])) | ||
| { | ||
| System.out.println(arr[i]); | ||
| return; | ||
| } | ||
| } | ||
| System.out.println("-1"); |
Author
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Using HasjMap to solve the question
Collaborator
|
also add |
Yatharth0045
requested changes
Nov 1, 2020
| @@ -0,0 +1,30 @@ | |||
| // "static void main" must be defined in a public class. | |||
Owner
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@pashmeen27 , checkout README and CONTRIBUTION files and follow all the guidelines regarding submitting a PR
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My solution to Q9 Find Duplicate in array using Java