# Text Justification Leetcode Solution

In this post, we are going to solve the Text Justification Leetcode Solution problem of Leetcode. This Leetcode problem is done in many programming languages like C++, Java, and Python.

## Problem

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: words = ["This", "is", "an", "example", "of", "text", "justification."], maxWidth = 16
Output:
[
"This    is    an",
"example  of text",
"justification.  "
]```

Example 2:

```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 because 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:
[
"Science  is  what we",
"understand      well",
"enough to explain to",
"a  computer.  Art is",
"everything  else  we",
"do                  "
]```

Constraints:

• `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`

Now, lets see the leetcode solution of Text Justification Leetcode Solution.

### Text Justification Leetcode Solution in Python

```class Solution:
def fullJustify(self, words: List[str], maxWidth: int) -> List[str]:
ans = []
row = []
rowLetters = 0

for word in words:
if rowLetters + len(word) + len(row) > maxWidth:
for i in range(maxWidth - rowLetters):
row[i % (len(row) - 1 or 1)] += ' '
ans.append(''.join(row))
row = []
rowLetters = 0
row.append(word)
rowLetters += len(word)

return ans + [' '.join(row).ljust(maxWidth)]
```

### Text Justification Leetcode Solutionin CPP

```class Solution {
public:
vector<string> fullJustify(vector<string>& words, size_t maxWidth) {
vector<string> ans;
vector<string> row;
size_t rowLetters = 0;

for (const string& word : words) {
// If we put the word in this row, it'll exceed the maxWidth,
// So we cannot put the word to this row and have to pad spaces to
// Each word in this row
if (rowLetters + row.size() + word.length() > maxWidth) {
const int spaces = maxWidth - rowLetters;
if (row.size() == 1) {
// Pad all spaces after row
for (int i = 0; i < spaces; ++i)
row += " ";
} else {
// Evenly pad spaces to each word (expect the last one) in this row
for (int i = 0; i < spaces; ++i)
row[i % (row.size() - 1)] += " ";
}
ans.push_back(join(row, ""));
row.clear();
rowLetters = 0;
}
row.push_back(word);
rowLetters += word.length();
}
ans.push_back(ljust(join(row, " "), maxWidth));

return ans;
}

private:
string join(const vector<string>& v, const string& c) {
string s;
for (auto p = begin(v); p != end(v); ++p) {
s += *p;
if (p != end(v) - 1)
s += c;
}
return s;
}

string ljust(string s, int width) {
for (int i = 0; i < s.length() - width; ++i)
s += " ";
return s;
}
};
```

### Text Justification Leetcode Solution in Java

```class Solution {
public List<String> fullJustify(String[] words, int maxWidth) {
List<String> ans = new ArrayList<>();
List<StringBuilder> row = new ArrayList<>();
int rowLetters = 0;

for (final String word : words) {
if (rowLetters + row.size() + word.length() > maxWidth) {
final int spaces = maxWidth - rowLetters;
if (row.size() == 1) {
for (int i = 0; i < spaces; ++i)
row.get(0).append(" ");
} else {
for (int i = 0; i < spaces; ++i)
row.get(i % (row.size() - 1)).append(" ");
}
final String joinedRow =
row.stream().map(StringBuilder::toString).collect(Collectors.joining(""));
row.clear();
rowLetters = 0;
}
rowLetters += word.length();
}

final String lastRow =
row.stream().map(StringBuilder::toString).collect(Collectors.joining(" "));
StringBuilder sb = new StringBuilder(lastRow);
final int spacesToBeAdded = maxWidth - sb.length();
for (int i = 0; i < spacesToBeAdded; ++i)
sb.append(" ");