Confused about the wording

#1

is this question different from reversing the array? kindly explain the logic as I am not able to understand the question

#2

Yes @yaheyafarooqui_8319591c036ff6e9
Both ques are different…

Inverse is Simply swapping the value of the array with the value at that index.

Algo

  1. Create a new Array say narr and original array is arr.
  2. now at the arr[i]th index of narr save the ith value.(previously i is the index and arr[i] is the value bt now arr[i] is the index and i is the value.)
  3. return new array.

refer this code ->

#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main() {
	int N;
	cin>>N;
	int a[N];
	for(int i =0;i<N;i++)
		cin>>a[i];
	int b[N];
	for(int j=0;j<N;j++){
		b[a[j]]=j;
	}
    for(int i=0;i<N;i++){
        cout<<b[i]<<" ";
    }
	return 0;
}
#3

@yaheyafarooqui_8319591c036ff6e9
Is there anything else or shall I mark this doubt as resolved?

#4

I think the question specified has to be done in a recursive manner, right? even though the code you shared passes the test case but it is not a recursive approach

#5

@yaheyafarooqui_8319591c036ff6e9


recursive code for the same…
Hope it clears your doubt…

#6

thank you for the help, much appreciated

1 Like
#7

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