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Name things for the reader, not the writer.

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Name things for the reader, not the writer.

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Product of Array Except Self

medium⏱ 15 mintypescriptchallengesproblem-solving-intermediate-

LEARN BY DOINGPut your intuition to work3 steps

Product of Array Except Self

Choose one small test case. What result do you expect, and why?

Use the lesson’s examples and explanation to check your idea.

Personal reflection. Nothing is sent to an AI service.

Exampleinput → output

Input

4
1 2 3 4

Output

24 12 8 6

Sample case — your program reads stdin and prints to stdout.

Starter

Given an integer array nums, return an array answer such that answer[i] is the product of all elements except nums[i].

Solve in O(n) without using division.

Algorithm: Two passes - left products then right products.

Example: [1,2,3,4] → [24,12,8,6] (24=234, 12=134, 8=124, 6=123)

Input format Line 1: n. Line 2: n space-separated integers.

Output format n space-separated integers (products except self).

Constraints 2 ≤ n ≤ 10⁵, -30 ≤ nums[i] ≤ 30

Name things for the reader, not the writer.

Tips & tricks

CodeDojo | Learn deeply. Build confidently.