Zero Array Transformation III
You are given an integer array nums of length n and a 2D array queries where queries[i] = [li, ri].
You are given an integer array nums of length n and a 2D array queries where queries[i] = [li, ri].
Each queries[i] represents the following action on nums:
A Zero Array is an array with all its elements equal to 0.
Return the maximum number of elements that can be removed from queries, such that nums can still be converted to a zero array using the remaining queries. If it is not possible to convert nums to a zero array, return -1.
Example 1
Input: nums = [2,0,2], queries = [[0,2],[0,2],[1,1]]
Output: 1
Explanation: After removing queries[2] , nums can still be converted to a zero array.
Example 2
Input: nums = [1,1,1,1], queries = [[1,3],[0,2],[1,3],[1,2]]
Output: 2
Explanation: We can remove queries[2] and queries[3] .
Example 3
Input: nums = [1,2,3,4], queries = [[0,3]]
Output: -1
Explanation: nums cannot be converted to a zero array even after using all the queries.
Constraints
- 1 <= nums.length <= 10^5
- 0 <= nums[i] <= 10^5
- 1 <= queries.length <= 10^5
- queries[i].length == 2
- 0 <= li <= ri < nums.length
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