Class Solution
java.lang.Object
g2801_2900.s2870_minimum_number_of_operations_to_make_array_empty.Solution
public class Solution
extends java.lang.Object
2870 - Minimum Number of Operations to Make Array Empty.
Medium
You are given a 0-indexed array nums
consisting of positive integers.
There are two types of operations that you can apply on the array any number of times:
- Choose two elements with equal values and delete them from the array.
- Choose three elements with equal values and delete them from the array.
Return the minimum number of operations required to make the array empty, or -1
if it is not possible.
Example 1:
Input: nums = [2,3,3,2,2,4,2,3,4]
Output: 4
Explanation: We can apply the following operations to make the array empty:
- Apply the first operation on the elements at indices 0 and 3. The resulting array is nums = [3,3,2,4,2,3,4].
- Apply the first operation on the elements at indices 2 and 4. The resulting array is nums = [3,3,4,3,4].
- Apply the second operation on the elements at indices 0, 1, and 3. The resulting array is nums = [4,4].
- Apply the first operation on the elements at indices 0 and 1. The resulting array is nums = [].
It can be shown that we cannot make the array empty in less than 4 operations.
Example 2:
Input: nums = [2,1,2,2,3,3]
Output: -1
Explanation: It is impossible to empty the array.
Constraints:
2 <= nums.length <= 105
1 <= nums[i] <= 106
-
Constructor Summary
-
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
-
Constructor Details
-
Solution
public Solution()
-
-
Method Details
-
minOperations
public int minOperations(int[] nums)
-