Sigmastar SSC862X行车记录仪解决方案

一、题目

Input Format

• The first line contains a single string s.
• The second line contains an integer k, the length of each substring.

Consider the following:

A string s of length n

An integer k where k is a factor of n，

We can split s into n/k substrings where each substring t consists of a contiguouse block of k chararcters in s. Then, use each t to create an string u which has all distinct characters.

Example

s = 'AAABCADDE'

k=3

There are three substring of length 3 to consider: 'AAA','BCA' and 'DDE'.

• The first substring is all 'A' characters. so u1 = 'A'. 
• The second substring has all distinct characters, so u2 = 'BCA'. 
• The third substring has 2 different characters. so u3 = 'DE'.

Note that a subsequence maintains the original order of characters encountered.

The order of characters in each subsequence shown is important.

Prints

Print each subsequence on a new line. There will be n/k of them. No return value is expected.

Sample Input

Sample Output

二、代码

def merge_the_tools(string, k):
    
    for i in range(len(string) // k):
        start_index = i * k
        end_index = start_index + k
        substr = string[start_index:end_index]
      
        result = []
        for char in list(substr):
            if char not in result:
                result.append(char)
        print(''.join(result))
    
    
if __name__ == '__main__':
    string, k = input(), int(input())
    merge_the_tools(string, k)

三、解读

这段代码实现将字符串分割成多个子字符串去重打印的任务。