Naming a Company
You are given an array of strings ideas that represents a list of names to be used in the process of naming a company.
You are given an array of strings ideas that represents a list of names to be used in the process of naming a company. The process of naming a company is as follows:
Return the number of distinct valid names for the company.
Example 1
Input: ideas = ["coffee","donuts","time","toffee"]
Output: 6
Explanation: The following selections are valid: - ("coffee", "donuts"): The company name created is "doffee conuts". - ("donuts", "coffee"): The company name created is "conuts doffee". - ("donuts", "time"): The company name created is "tonuts dime". - ("donuts", "toffee"): The company name created is "tonuts doffee". - ("time", "donuts"): The company name created is "dime tonuts". - ("toffee", "donuts"): The company name created is "doffee tonuts". Therefore, there are a total of 6 distinct company names. The following are some examples of invalid selections: - ("coffee", "time"): The name "toffee" formed after swapping already exists in the original array. - ("time", "toffee"): Both names are still the same after swapping and exist in the original array. - ("coffee", "toffee"): Both names formed after swapping already exist in the original array.
Example 2
Input: ideas = ["lack","back"]
Output: 0
Explanation: There are no valid selections. Therefore, 0 is returned.
Constraints
- 2 <= ideas.length <= 5 * 10^4
- 1 <= ideas[i].length <= 10
- ideas[i] consists of lowercase English letters.
- All the strings in ideas are unique.
Hints
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