How to Solve Count Almost Equal Pairs I Problem
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Count Almost Equal Pairs I
You are given an array nums consisting of positive integers. We call two integers x and y in this problem almost equal if both integers can become equal after performing the following operation at mos...
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Understanding the Count Almost Equal Pairs I Problem
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Problem Statement
You are given an array nums consisting of positive integers. We call two integers x and y in this problem almost equal if both integers can become equal after performing the following operation at most once: Choose either x or y and swap any two digits within the chosen number. Return the number of indices i and j in nums where i < j such that nums[i] and nums[j] are almost equal. Note that it is allowed for an integer to have leading zeros after performing an operation.
Count Almost Equal Pairs I
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Examples
nums = [3,12,30,17,21]2The almost equal pairs of elements are: 3 and 30. By swapping 3 and 0 in 30, you get 3. 12 and 21. By swapping 1 and 2 in 12, you get 21.
nums = [1,1,1,1,1]10Every two elements in the array are almost equal.
nums = [123,231]0We cannot swap any two digits of 123 or 231 to reach the other.
Constraints
2 <= nums.length <= 1001 <= nums[i] <= 106How Interview Coder Helps with Leetcode Problems
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