Sum of Digit Differences of All Pairs - Practice Coding | SlaveCode
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3153. Sum of Digit Differences of All Pairs
Medium
30 Points
Array
Hash Table
Math
Counting
You are given an array nums consisting of positive integers where all integers have the same number of digits.
The digit difference between two integers is the count of different digits that are in the same position in the two integers.
Return the sum of the digit differences between all pairs of integers in nums.
Examples
Example 1
Input: nums = [13,23,12]
Output: 4
Explanation: We have the following: - The digit difference between 1 3 and 2 3 is 1. - The digit difference between 1 3 and 1 2 is 1. - The digit difference between 23 and 12 is 2. So the total sum of digit differences between all pairs of integers is 1 + 1 + 2 = 4 .
Example 2
Input: nums = [10,10,10,10]
Output: 0
Explanation: All the integers in the array are the same. So the total sum of digit differences between all pairs of integers will be 0.
Constraints
2 <= nums.length <= 105
1 <= nums[i] < 109
All integers in nums have the same number of digits.
3153. Sum of Digit Differences of All Pairs
Medium
30 Points
Array
Hash Table
Math
Counting
You are given an array nums consisting of positive integers where all integers have the same number of digits.
The digit difference between two integers is the count of different digits that are in the same position in the two integers.
Return the sum of the digit differences between all pairs of integers in nums.
Examples
Example 1
Input: nums = [13,23,12]
Output: 4
Explanation: We have the following: - The digit difference between 1 3 and 2 3 is 1. - The digit difference between 1 3 and 1 2 is 1. - The digit difference between 23 and 12 is 2. So the total sum of digit differences between all pairs of integers is 1 + 1 + 2 = 4 .
Example 2
Input: nums = [10,10,10,10]
Output: 0
Explanation: All the integers in the array are the same. So the total sum of digit differences between all pairs of integers will be 0.
Constraints
2 <= nums.length <= 105
1 <= nums[i] < 109
All integers in nums have the same number of digits.