4Sum Code Implementation

#1

Here is the code implemetation of the question 4sum, i.e, we need to find quadruple pairs:- https://ide.codingblocks.com/s/451298, please specify what is the error in the code and for the test case in input window, it is not giving the first quadruple.

#2

can you please share the link to the q as you have tagged some other questio in your doubt

#3

This the question link:- https://leetcode.com/problems/4sum/