Determine whether an array can be transformed into all zeros using a fixed set of range decrement operations.
You are given an integer array nums and a list of queries. Each query describes a contiguous subarray range. For a chosen query, you may apply one operation that decreases every element in that range by 1.
Your task is to determine whether it is possible to apply some subset of the queries so that, after all chosen operations, every value in nums becomes exactly 0.
The key constraint is that a query can be used at most once, and if an element is decremented multiple times, all decrements must be supported by queries whose ranges include that position.
Return true if the transformation is possible, otherwise return false.
nums: an integer array.queries: an array of ranges, where each range is typically represented by two indices [l, r] inclusive.The exact platform input format may vary, but the core objects are:
numsReturn a boolean value:
true if nums can be transformed into all zerosfalse otherwisenums.1 over the selected range.Common intended constraints for this type of problem are large enough that an simulation may be too slow, so an efficient range-accumulation approach is expected.
Example 1
Input
nums = [2,1,2] queries = [[0,1],[1,2],[0,2]]
Output
true
Explanation
Use the first and third queries to decrement index 0 twice, the first and second queries to decrement index 1 twice, and the second and third queries to decrement index 2 twice overall as needed by the array values. The ranges provide enough coverage to reduce every element to zero.
Example 2
Input
nums = [1,2,1] queries = [[0,0],[2,2]]
Output
false
Explanation
Index 1 needs two decrements, but no query covers it. Therefore the array cannot be transformed into all zeros.
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