DevExCode

68. Text Justification

ArrayStringSimulation

Explanation:

To solve this problem, we can follow these steps:

  1. Iterate over the words list and greedily form lines by adding words until the line length exceeds the maxWidth.
  2. Calculate the total number of spaces required to evenly distribute among words in each line.
  3. Handle the special case when there is only one word in a line or it is the last line.
  4. Construct the final result by formatting the lines with appropriate spaces.

Time Complexity: O(N), where N is the total number of characters in all words.

Space Complexity: O(N), where N is the total number of characters in all words.

:

View Leetcode Problem
class Solution {
    public List<String> fullJustify(String[] words, int maxWidth) {
        List<String> result = new ArrayList<>();
        int start = 0;
        
        while (start < words.length) {
            int end = start + 1;
            int lineLength = words[start].length();
            
            while (end < words.length && lineLength + words[end].length() + (end - start) <= maxWidth) {
                lineLength += words[end].length();
                end++;
            }
            
            int spaces = maxWidth - lineLength;
            int gaps = end - start - 1;
            
            StringBuilder sb = new StringBuilder();
            sb.append(words[start]);
            
            if (gaps == 0 || end == words.length) {
                for (int i = start + 1; i < end; i++) {
                    sb.append(" ").append(words[i]);
                }
                for (int i = sb.length(); i < maxWidth; i++) {
                    sb.append(" ");
                }
            } else {
                int spacesPerGap = spaces / gaps;
                int extraSpaces = spaces % gaps;
                
                for (int i = start + 1; i < end; i++) {
                    for (int j = 0; j < spacesPerGap; j++) {
                        sb.append(" ");
                    }
                    if (extraSpaces > 0) {
                        sb.append(" ");
                        extraSpaces--;
                    }
                    sb.append(words[i]);
                }
            }
            
            result.add(sb.toString());
            start = end;
        }
        
        return result;
    }
}

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