Hard

Quiz

#220 Contains Duplicate III

APPROACH

You are given an integer array nums and two integers indexDiff and valueDiff.

Find a pair of indices (i, j) such that:

- i != j,

- abs(i - j) <= indexDiff.

- abs(nums[i] - nums[j]) <= valueDiff, and

Return true if such pair exists or false otherwise.

Example 1:

Input: nums = [1,2,3,1], indexDiff = 3, valueDiff = 0

Output: true

Explanation: We can choose (i, j) = (0, 3).

We satisfy the three conditions:

i != j --> 0 != 3

abs(i - j) <= indexDiff --> abs(0 - 3) <= 3

abs(nums[i] - nums[j]) <= valueDiff --> abs(1 - 1) <= 0

Example 2:

Input: nums = [1,5,9,1,5,9], indexDiff = 2, valueDiff = 3

Output: false

Explanation: After trying all the possible pairs (i, j), we cannot satisfy the three conditions, so we return false.

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What is the optimal approach for this problem?