Skip to content

Latest commit

 

History

History

1200

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
 
 

Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements. 

Return a list of pairs in ascending order(with respect to pairs), each pair [a, b] follows

  • a, b are from arr
  • a < b
  • b - a equals to the minimum absolute difference of any two elements in arr

 

Example 1:

Input: arr = [4,2,1,3]
Output: [[1,2],[2,3],[3,4]]
Explanation: The minimum absolute difference is 1. List all pairs with difference equal to 1 in ascending order.

Example 2:

Input: arr = [1,3,6,10,15]
Output: [[1,3]]

Example 3:

Input: arr = [3,8,-10,23,19,-4,-14,27]
Output: [[-14,-10],[19,23],[23,27]]

 

Constraints:

  • 2 <= arr.length <= 10^5
  • -10^6 <= arr[i] <= 10^6

Companies:
Salesforce, Twitter

Related Topics:
Array, Sorting

Solution 1.

// OJ: https://leetcode.com/problems/minimum-absolute-difference/
// Author: github.com/lzl124631x
// Time: O(NlogN)
// Space: O(1) extra space
class Solution {
public:
    vector<vector<int>> minimumAbsDifference(vector<int>& A) {
        sort(begin(A), end(A));
        int N = A.size(), minDiff = INT_MAX;
        vector<vector<int>> ans;
        for (int i = 1; i < N; ++i) minDiff = min(minDiff, A[i] - A[i - 1]);
        for (int i = 1; i < N; ++i) {
            if (A[i] - A[i - 1] == minDiff) ans.push_back({ A[i - 1], A[i] });
        }
        return ans;
    }
};