triplet.java

import java.util.Scanner;
public class triplet {
    static int tripletSum(int []arr,int target){
        int ans=0;
        int n=arr.length;
        for(int i=0;i<n;i++){
            for(int j=i+1;j<n;j++){
                for(int k=j+1;k<n;k++){
                    if(arr[i]+arr[j]+arr[k]==target){
                        ans++;
                    }
                }
            }
        }
        return ans;
    }
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        System.out.println("enter array size:");
        int n=sc.nextInt();
        int []arr=new int[n];
        System.out.println("enter" +n+ "elements");
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        System.out.println("enter target sum");
        int target=sc.nextInt();
        System.out.println(tripletSum(arr,target));
    }
}