Update readme.md

Author: javadev

src/main/kotlin/g0001_0100/s0068_text_justification/readme.md

@@ -1,23 +1,45 @@
-67\. Add Binary
+68\. Text Justification
 
-Easy
+Hard
 
-Given two binary strings `a` and `b`, return _their sum as a binary string_.
+Given an array of strings `words` and a width `maxWidth`, format the text such that each line has exactly `maxWidth` characters and is fully (left and right) justified.
+
+You should pack your words in a greedy approach; that is, pack as many words as you can in each line. Pad extra spaces `' '` when necessary so that each line has exactly `maxWidth` characters.
+
+Extra spaces between words should be distributed as evenly as possible. If the number of spaces on a line does not divide evenly between words, the empty slots on the left will be assigned more spaces than the slots on the right.
+
+For the last line of text, it should be left-justified and no extra space is inserted between words.
+
+**Note:**
+
+*   A word is defined as a character sequence consisting of non-space characters only.
+*   Each word's length is guaranteed to be greater than 0 and not exceed maxWidth.
+*   The input array `words` contains at least one word.
 
 **Example 1:**
 
-**Input:** a = "11", b = "1"
+**Input:** words = ["This", "is", "an", "example", "of", "text", "justification."], maxWidth = 16
 
-**Output:** "100"
+**Output:** [ "This is an", "example of text", "justification. " ]
 
 **Example 2:**
 
-**Input:** a = "1010", b = "1011"
+**Input:** words = ["What","must","be","acknowledgment","shall","be"], maxWidth = 16
+
+**Output:** [ "What must be", "acknowledgment ", "shall be " ]
+
+**Explanation:** Note that the last line is "shall be " instead of "shall be", because the last line must be left-justified instead of fully-justified. Note that the second line is also left-justified becase it contains only one word.
+
+**Example 3:**
+
+**Input:** words = ["Science","is","what","we","understand","well","enough","to","explain","to","a","computer.","Art","is","everything","else","we","do"], maxWidth = 20
 
-**Output:** "10101"
+**Output:** [ "Science is what we", "understand well", "enough to explain to", "a computer. Art is", "everything else we", "do " ]
 
 **Constraints:**
 
-*   <code>1 <= a.length, b.length <= 10<sup>4</sup></code>
-*   `a` and `b` consist only of `'0'` or `'1'` characters.
-*   Each string does not contain leading zeros except for the zero itself.
+*   `1 <= words.length <= 300`
+*   `1 <= words[i].length <= 20`
+*   `words[i]` consists of only English letters and symbols.
+*   `1 <= maxWidth <= 100`
+*   `words[i].length <= maxWidth`