Zero Array Transformation IV
You are given an integer array nums of length n and a 2D array queries, where queries[i] = [li, ri, vali].
You are given an integer array nums of length n and a 2D array queries, where queries[i] = [li, ri, vali].
Each queries[i] represents the following action on nums:
A Zero Array is an array with all its elements equal to 0.
Return the minimum possible non-negative value of k, such that after processing the first k queries in sequence, nums becomes a Zero Array. If no such k exists, return -1.
Example 1
Input: nums = [2,0,2], queries = [[0,2,1],[0,2,1],[1,1,3]]
Output: 2
Example 2
Input: nums = [4,3,2,1], queries = [[1,3,2],[0,2,1]]
Output: -1
Explanation: It is impossible to make nums a Zero Array even after all the queries.
Example 3
Input: nums = [1,2,3,2,1], queries = [[0,1,1],[1,2,1],[2,3,2],[3,4,1],[4,4,1]]
Output: 4
Example 4
Input: nums = [1,2,3,2,6], queries = [[0,1,1],[0,2,1],[1,4,2],[4,4,4],[3,4,1],[4,4,5]]
Output: 4
Constraints
- 1 <= nums.length <= 10
- 0 <= nums[i] <= 1000
- 1 <= queries.length <= 1000
- queries[i] = [li, ri, vali]
- 0 <= li <= ri < nums.length
- 1 <= vali <= 10
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