How should I practice Find Max Number of Pairs?

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Find Max Number of Pairs

Roblox● EasyINTERNOA

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Problem statement

Given an array, find the numbers with the same number of digits that can form the largest number of different pairs. For example, given the array {1, 9, 23, 30, 54, 103}, the possible pairs are {1, 9}, {23, 30}, {23, 54}, {30, 54}, and the output should be 4.

Function

findMaxNumberOfPairs(nums: int[]) → int

Examples

Example 1

nums = [1, 9, 23, 30, 54, 103]return = 4

The possible pairs with the same number of digits are:

{1, 9}
{23, 30}
{23, 54}

There are a total of 4 different pairs, so the output is 4.

Constraints

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Problem statement

Function

Examples

Example 1

Constraints

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