Given an array where each element is the money a person have and there is only Rs. 3 note. We need to check whether it is possible to divide the money equally among all the persons or not. If it is possible then find Minimum number of transactions needed.
Example 1:
Input: nums = [5, 8, 11]
Output: 1
Explanation: 3rd person can give Rs. 3
then all person would have Rs. 8
Example 2:
Input: nums = [1, 2, 3, 4]
Output: -1
Explanation: 1 + 2 + 3 + 4 = 10. Rs. 10
can not be distributed among 4 persons.
Your Task:
You don't need to read or print anything. Your task is to complete the function MinimumTransaction() which takes the array as input parameter and returns the minimum number of transactions needed to distribute the money equally. If not possible returns -1.
Expected Time Complexity: O(n) where n is length of array Expected Space Complexity: O(1)
Constraints:
1 <= n <= 105
1 <= elements of array <= 106
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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