Package g3301_3400.s3355_zero_array_transformation_i

Class Solution

java.lang.Object
g3301_3400.s3355_zero_array_transformation_i.Solution
public class Solution extends Object
3355 - Zero Array Transformation I.

Medium

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.

A subset of an array is a selection of elements (possibly none) of the array.

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • isZeroArray

      public boolean isZeroArray(int[] nums, int[][] queries)