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 fromarr
a < b
b - a
equals to the minimum absolute difference of any two elements inarr
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
// 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;
}
};