LeetCode 1324: Print Words Vertically Solution

Master LeetCode problem 1324 (Print Words Vertically), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

1324. Print Words Vertically

Medium

Array String Simulation

Problem Explanation

Explanation

To solve this problem, we can follow these steps:

Split the input string s into a list of words.
Find the maximum length among all the words.
Iterate over each character position from 0 to the maximum word length.
For each character position, iterate over all the words and add the character at that position to the result string for that column.
Trim any trailing spaces from the result strings.

Time complexity: O(n * m), where n is the number of words and m is the length of the longest word.
Space complexity: O(n * m), for storing the output list of strings.

Solution Code

class Solution {
    public List<String> printVertically(String s) {
        List<String> words = Arrays.asList(s.split(" "));
        int maxLen = words.stream().mapToInt(String::length).max().getAsInt();
        List<String> result = new ArrayList<>();
        
        for (int i = 0; i < maxLen; i++) {
            StringBuilder sb = new StringBuilder();
            for (String word : words) {
                sb.append(i < word.length() ? word.charAt(i) : " ");
            }
            result.add(sb.toString().replaceAll("\\s+$", ""));
        }
        
        return result;
    }
}

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