Package g1701_1800.s1726_tuple_with_same_product

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1726 - Tuple with Same Product\.

    Medium

    Given an array nums of distinct positive integers, return the number of tuples (a, b, c, d) such that a * b = c * d where a, b, c, and d are elements of nums, and a != b != c != d.

    Example 1:

    Input: nums = 2,3,4,6

    Output: 8

    Explanation: There are 8 valid tuples:

    (2,6,3,4) , (2,6,4,3) , (6,2,3,4) , (6,2,4,3)

    (3,4,2,6) , (4,3,2,6) , (3,4,6,2) , (4,3,6,2)

    Example 2:

    Input: nums = 1,2,4,5,10

    Output: 16

    Explanation: There are 16 valid tuples:

    (1,10,2,5) , (1,10,5,2) , (10,1,2,5) , (10,1,5,2)

    (2,5,1,10) , (2,5,10,1) , (5,2,1,10) , (5,2,10,1)

    (2,10,4,5) , (2,10,5,4) , (10,2,4,5) , (10,2,5,4)

    (4,5,2,10) , (4,5,10,2) , (5,4,2,10) , (5,4,10,2)

    Constraints:

    • 1 <= nums.length <= 1000

    • <code>1 <= numsi<= 10<sup>4</sup></code>

    • All elements in nums are distinct.

    • 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 Integer tupleSameProduct(IntArray nums)

      • Methods inherited from class java.lang.Object

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