How to Solve Zero Array Transformation I V Problem
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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]. Each queries[i] represents the following action on nums: Select a subset of indices in the ra...
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Understanding the Zero Array Transformation I V Problem
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Problem Statement
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: Select a subset of indices in the range [li, ri] from nums. Decrement the value at each selected index by exactly vali. 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.
Zero Array Transformation IV
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Examples
nums = [2,0,2], queries = [[0,2,1],[0,2,1],[1,1,3]]2For query 0 (l = 0, r = 2, val = 1): Decrement the values at indices [0, 2] by 1. The array will become [1, 0, 1]. For query 1 (l = 0, r = 2, val = 1): Decrement the values at indices [0, 2] by 1. The array will become [0, 0, 0], which is a Zero Array. Therefore, the minimum value of k is 2.
nums = [4,3,2,1], queries = [[1,3,2],[0,2,1]]-1It is impossible to make nums a Zero Array even after all the queries.
nums = [1,2,3,2,1], queries = [[0,1,1],[1,2,1],[2,3,2],[3,4,1],[4,4,1]]4For query 0 (l = 0, r = 1, val = 1): Decrement the values at indices [0, 1] by 1. The array will become [0, 1, 3, 2, 1]. For query 1 (l = 1, r = 2, val = 1): Decrement the values at indices [1, 2] by 1. The array will become [0, 0, 2, 2, 1]. For query 2 (l = 2, r = 3, val = 2): Decrement the values at indices [2, 3] by 2. The array will become [0, 0, 0, 0, 1]. For query 3 (l = 3, r = 4, val = 1): Decrement the value at index 4 by 1. The array will become [0, 0, 0, 0, 0]. Therefore, the minimum value of k is 4.
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]]4Constraints
1 <= nums.length <= 100 <= nums[i] <= 10001 <= queries.length <= 1000queries[i] = [li, ri, vali]0 <= li <= ri < nums.length1 <= vali <= 10How Interview Coder Helps with Leetcode Problems
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