Package g1801_1900.s1862_sum_of_floored_pairs

Class Solution

java.lang.Object
g1801_1900.s1862_sum_of_floored_pairs.Solution
public class Solution extends java.lang.Object
1862 - Sum of Floored Pairs.

Hard

Given an integer array nums, return the sum of floor(nums[i] / nums[j]) for all pairs of indices 0 <= i, j < nums.length in the array. Since the answer may be too large, return it modulo 109 + 7.

The floor() function returns the integer part of the division.

Example 1:

Input: nums = [2,5,9]

Output: 10

Explanation:

floor(2 / 5) = floor(2 / 9) = floor(5 / 9) = 0

floor(2 / 2) = floor(5 / 5) = floor(9 / 9) = 1

floor(5 / 2) = 2

floor(9 / 2) = 4

floor(9 / 5) = 1

We calculate the floor of the division for every pair of indices in the array then sum them up.

Example 2:

Input: nums = [7,7,7,7,7,7,7]

Output: 49

Constraints:

  • 1 <= nums.length <= 105
  • 1 <= nums[i] <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    sumOfFlooredPairs(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

    • sumOfFlooredPairs

      public int sumOfFlooredPairs(int[] nums)