zero-array-transformation-i

You are given an integer array nums of length n and a 2D array queries, where queries[i] = [li, ri].

For each queries[i]:

• Select a subset of indices within the range [li, ri] in nums.


• Decrement the values at the selected indices by 1.

A Zero Array is an array where all elements are equal to 0.

Return true if it is possible to transform nums into a Zero Array after processing all the queries sequentially, otherwise return false.

Example 1:

Input: nums = [1,0,1], queries = [[0,2]]

Output: true

Explanation:

• For i = 0:
  
  
  
  
  • Select the subset of indices as [0, 2] and decrement the values at these indices by 1.
  
  
  • The array will become [0, 0, 0], which is a Zero Array.
  
  
  
  

Example 2:

Input: nums = [4,3,2,1], queries = [[1,3],[0,2]]

Output: false

Explanation:

• For i = 0:
  
  
  
  
  • Select the subset of indices as [1, 2, 3] and decrement the values at these indices by 1.
  
  
  • The array will become [4, 2, 1, 0].
  
  
  
  


• For i = 1:
  
  
  
  • Select the subset of indices as [0, 1, 2] and decrement the values at these indices by 1.
  
  
  • The array will become [3, 1, 0, 0], which is not a Zero Array.
  
  
  
  

Constraints:

• 1 <= nums.length <= 105


• 0 <= nums[i] <= 105


• 1 <= queries.length <= 105


• queries[i].length == 2


• 0 <= li <= ri < nums.length