Zero Array Transformation II
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:
- Decrement the value at each index in the range
[li, ri]innumsby at mostvali. - The amount by which each value is decremented can be chosen independently for each index.
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
2After processing the first two queries,
nums can be decremented to [0, 0, 0], so the minimum value of k is 2.Example 2
Input
nums = [4,3,2,1], queries = [[1,3,2],[0,2,1]]Output
-1Even after processing all queries,
nums can only become [3, 0, 0, 0], which is not a Zero Array.Constraints
- 1 <= nums.length <= 10^5
- 0 <= nums[i] <= 5 * 10^5
- 1 <= queries.length <= 10^5
- queries[i].length == 3
- 0 <= li <= ri < nums.length
- 1 <= vali <= 5