#3356
Zero Array Transformation II
specialist · 965 · lc medium +32 · 43.6% accepted · 1,024 likes · top 25%
Description
You are given an integer array nums of length n and a 2D array queries where queries[i] = [li, ri, vali].
Each queries[i] performs the following on nums:
- Decrease each index in the range [li, ri] by at most vali.
- The decrement at each index may be chosen independently.
A Zero Array has all elements equal to 0.
Return the minimum non-negative integer k such that processing the first k queries transforms nums into a Zero Array, or -1 if no such k exists.
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