Package g0201_0300.s0238_product_of_array_except_self

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    238 - Product of Array Except Self.

    Medium

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

    The product of any prefix or suffix of nums is guaranteed to fit in a 32-bit integer.

    You must write an algorithm that runs in O(n) time and without using the division operation.

    Example 1:

    Input: nums = 1,2,3,4

    Output: 24,12,8,6

    Example 2:

    Input: nums = -1,1,0,-3,3

    Output: 0,0,9,0,0

    Constraints:

    • <code>2 <= nums.length <= 10<sup>5</sup></code>

    • -30 &lt;= nums[i] &lt;= 30

    • The product of any prefix or suffix of nums is guaranteed to fit in a 32-bit integer.

    Follow up: Can you solve the problem in O(1) extra space complexity? (The output array does not count as extra space for space complexity analysis.)

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final IntArray productExceptSelf(IntArray nums)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait