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2129. Capitalize the Title

Description

You are given a string title consisting of one or more words separated by a single space, where each word consists of English letters. Capitalize the string by changing the capitalization of each word such that:

  • If the length of the word is 1 or 2 letters, change all letters to lowercase.
  • Otherwise, change the first letter to uppercase and the remaining letters to lowercase.

Return the capitalized title.

 

Example 1:

Input: title = "capiTalIze tHe titLe"
Output: "Capitalize The Title"
Explanation:
Since all the words have a length of at least 3, the first letter of each word is uppercase, and the remaining letters are lowercase.

Example 2:

Input: title = "First leTTeR of EACH Word"
Output: "First Letter of Each Word"
Explanation:
The word "of" has length 2, so it is all lowercase.
The remaining words have a length of at least 3, so the first letter of each remaining word is uppercase, and the remaining letters are lowercase.

Example 3:

Input: title = "i lOve leetcode"
Output: "i Love Leetcode"
Explanation:
The word "i" has length 1, so it is lowercase.
The remaining words have a length of at least 3, so the first letter of each remaining word is uppercase, and the remaining letters are lowercase.

 

Constraints:

  • 1 <= title.length <= 100
  • title consists of words separated by a single space without any leading or trailing spaces.
  • Each word consists of uppercase and lowercase English letters and is non-empty.

Solutions

  • class Solution {
        public String capitalizeTitle(String title) {
            List<String> ans = new ArrayList<>();
            for (String s : title.split(" ")) {
                if (s.length() < 3) {
                    ans.add(s.toLowerCase());
                } else {
                    ans.add(s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase());
                }
            }
            return String.join(" ", ans);
        }
    }
    
  • class Solution {
    public:
        string capitalizeTitle(string title) {
            transform(title.begin(), title.end(), title.begin(), ::tolower);
            istringstream ss(title);
            string ans;
            while (ss >> title) {
                if (title.size() > 2) title[0] = toupper(title[0]);
                ans += title;
                ans += " ";
            }
            ans.pop_back();
            return ans;
        }
    };
    
  • class Solution:
        def capitalizeTitle(self, title: str) -> str:
            words = [w.lower() if len(w) < 3 else w.capitalize() for w in title.split()]
            return " ".join(words)
    
    
  • func capitalizeTitle(title string) string {
    	title = strings.ToLower(title)
    	words := strings.Split(title, " ")
    	for i, s := range words {
    		if len(s) > 2 {
    			words[i] = strings.Title(s)
    		}
    	}
    	return strings.Join(words, " ")
    }
    
  • function capitalizeTitle(title: string): string {
        const ans: string[] = [];
        for (const s of title.split(' ')) {
            if (s.length < 3) {
                ans.push(s.toLowerCase());
            } else {
                ans.push(s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase());
            }
        }
        return ans.join(' ');
    }
    
    

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