Given two arrays which are duplicates of each other except one element, that is one element from one of the array is missing, we need to find that missing element.
Input: A = [1, 4, 5, 7, 9] B = [4, 5, 7, 9] Output:  1 is missing from second array. Input: A = [2, 3, 4, 5 B = 2, 3, 4, 5, 6] Output:  6 is missing from first array.
We have existing solution for this problem please refer Find lost element from a duplicated array. We can solve this problem quickly in python using Set difference logic. Approach is very simple, simply convert both lists in Set and perform A-B operation where len(A)>len(B).
- Find lost element from a duplicated array
- Python heapq to find K'th smallest element in a 2D array
- Replace each element by the difference of the total size of the array and frequency of that element
- Python | Pandas Dataframe.duplicated()
- Python | Pandas TimedeltaIndex.duplicated
- Python | Pandas Index.duplicated()
- Python | Pandas Series.duplicated()
- Sum of minimum absolute difference of each array element
- Maximum difference between first and last indexes of an element in array
- Find last element after deleting every second element in array of n integers
- Minimize sum of adjacent difference with removal of one element from array
- Search an element in an array where difference between adjacent elements is 1
- Python | Generate successive element difference list
- Find the difference of count of equal elements on the right and the left for each element
- Find an element in array such that sum of left array is equal to sum of right array
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.