The problem is asking to find the lexicographically smallest and largest substrings of a given string with a specified length. Here are the steps to solve this problem: 1. First, we need to understand the problem constraints. The string consists of English alphabetic letters only and the length of the substrings to find is given as an integer. 2. We start by initializing two variables, `min` and `max`, as the first substring of the given length. 3. Then, we iterate over the string from the second character to the end, each time taking a substring of the given length. 4. For each substring, we compare it with the current `min` and `max`. If it's lexicographically smaller than `min`, we update `min`. If it's lexicographically larger than `max`, we update `max`. 5. After we've checked all substrings, `min` and `max` hold the lexicographically smallest and largest substrings of the given length. 6. Finally, we return the result as a string in the format 'min max'. Here is a Python solution for the problem: ```python def getSmallestAndLargest(s, k): min_sub = max_sub = s[:k] for i in range(len(s) - k + 1): sub = s[i:i+k] if sub max_sub: max_sub = sub return min_sub + " " + max_sub ``` This function takes a string `s` and an integer `k` as input, and returns the lexicographically smallest and largest substrings of length `k` in `s`.

Question

The problem is asking to find the lexicographically smallest and largest substrings of a given string with a specified length. Here are the steps to solve this problem:

1. First, we need to understand the problem constraints. The string consists of English alphabetic letters only and the length of the substrings to find is given as an integer.

2. We start by initializing two variables, `min` and `max`, as the first substring of the given length.

3. Then, we iterate over the string from the second character to the end, each time taking a substring of the given length.

4. For each substring, we compare it with the current `min` and `max`. If it's lexicographically smaller than `min`, we update `min`. If it's lexicographically larger than `max`, we update `max`.

5. After we've checked all substrings, `min` and `max` hold the lexicographically smallest and largest substrings of the given length.

6. Finally, we return the result as a string in the format 'min
max'.

Here is a Python solution for the problem:

```python
def getSmallestAndLargest(s, k):
    min_sub = max_sub = s[:k]
    for i in range(len(s) - k + 1):
        sub = s[i:i+k]
        if sub < min_sub:
            min_sub = sub
        if sub > max_sub:
            max_sub = sub
    return min_sub + "
" + max_sub
```

This function takes a string `s` and an integer `k` as input, and returns the lexicographically smallest and largest substrings of length `k` in `s`.

Knowee AI · Accepted Answer