# Java Substring Comparisons

### Problem Statement :

```We define the following terms:

Lexicographical Order, also known as alphabetic or dictionary order, orders characters as follows:
A<B<...<Y<Z<a<b<...<y<z
For example, ball < cat, dog < dorm, Happy < happy, Zoo < ball.
A substring of a string is a contiguous block of characters in the string. For example, the substrings of abc are a, b, c, ab, bc, and abc.

Given a string, s, and an integer, k, complete the function so that it finds the lexicographically smallest and largest substrings of length k.

Input Format

The first line contains a string denoting s.
The second line contains an integer denoting k.

Constraints
1<=|s|<=1000
s consists of English alphabetic letters only (i.e., [a-zA-Z]).

Output Format

Return the respective lexicographically smallest and largest substrings as a single newline-separated string.```

### Solution :

```                            ```Solution in C :

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String line = scanner.nextLine();
int k = scanner.nextInt();
String minSubstring = line.substring(0,k);
String maxSubstring = line.substring(0,k);
for (int i = 1; i < line.length()-k+1; i++) {
String sub = line.substring(i,i+k);
if (sub.compareTo(minSubstring) < 0) {
minSubstring = sub;
}
if (sub.compareTo(maxSubstring) > 0) {
maxSubstring = sub;
}
}
System.out.println(minSubstring);
System.out.println(maxSubstring);
}
}```
```

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