Product of Array Except Self
Given an integer array nums Return an array where answer[i] is the product of all elements except nums[i] Must run in O(n) time without using division Example: [1,2,3,4] => [24,12,8,6]
At its core, Product of Array Except Self rewards a simple data-structure choice over clever math. Interviewers love it because it reveals your data-structure instincts and your edge-case discipline. Watch your edge cases around repeats, and be clear about what your map is storing.
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