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Problem

Submissions

Product Of Array Except Self

Contributed by

Pankaj Sharma

Last Updated: 23 Feb, 2023

Easy

0/40

Avg time to solve 26 mins

161 upvotes

Problem Statement

You have been given an integer array/list (ARR) of size N. You have to return an array/list PRODUCT such that PRODUCT[i] is equal to the product of all the elements of ARR except ARR[i]

Note :

Each product can cross the integer limits, so we should take modulo of the operation. 

Take MOD = 10^9 + 7 to always stay in the limits.

Follow up :

Can you try solving the problem in O(1) space?

Detailed explanation ( Input/output format, Notes, Images )

Input format :

The first line contains an integer 'T' which denotes the number of test cases or queries to be run. Then the test cases follow.

The first line of each test case or query contains an integer 'N' representing the size of the array/list.

The second line contains 'N' single space-separated integers representing the elements in the array/list.

Output Format :

For each test case, print the elements of the 'PRODUCT' array separated by a single space. 

Output for every test case will be printed in a separate line.

Important Note :

You are required to return the product array and no need to print the result explicitly. It has already been taken care of.

Constraints :

1 <= T <= 100
0 <= N <= 10^5
0 <= ARR[i] <= 10^5

Time Limit: 1 sec

Sample Input 1 :

Sample Output 1 :

6 3 2
4 10 10

Explanation for Sample Output 1 :

 Test case 1 : Given array = {1, 2, 3] 
 Required array = [2 * 3, 1 * 3, 1 * 2] = [6, 3, 2]
 Test case 2 : Given array = {5, 2, 2] 
 Required array = [2 * 2, 5 * 2, 5 * 2] = [4, 10, 10]

Sample Input 2 :

Sample Output 2 :

1
2 1

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