SmallestDifference.py

"""1200. Minimum Absolute Difference
Easy

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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
"""

def smallestDifference(arr1 : list, arr2 : list) : 
    arr1.sort();arr2.sort()
    i = 0;j = 0

    smallest = float("inf");current=float("inf")
    smallestPair = list()
    
    while i < len(arr1) and j < len(arr2) : 
        fnum = arr1[i];snum = arr2[j]
        
        if fnum < snum : 
            current = snum - fnum
            i += 1
        elif snum < fnum : 
            current = snum - fnum
            j += 1
        else : 
            return [fnum, snum]

        if current < smallest : 
            smallest = current
            smallestPair.append((fnum, snum))
            


if __name__ == '__main__' : 
    print(smallestDifference([12,3,45,6], [2,4,3,5]))