Package g1701_1800.s1726_tuple_with_same_product

Class Solution

java.lang.Object
g1701_1800.s1726_tuple_with_same_product.Solution
public class Solution extends java.lang.Object
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
  • 1 <= nums[i] <= 104
  • All elements in nums are distinct.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    tupleSameProduct(int[] nums)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • tupleSameProduct

      public int tupleSameProduct(int[] nums)