CodeSignal [36/60] differentSymbolsNaive

Problem:

Given a string, find the number of different characters in it.

 

Example

For s = "cabca", the output should be
differentSymbolsNaive(s) = 3.

There are 3 different characters a, b and c.

 

-Summary-

1. Create a temporary set variable to not have a duplicate value

2. Using for loop, if the character is already in the set, we skip and continue.

   If the first character faced, we add in to set and increase the count.

3. return with count

사람들이 올린 답을 보니, 다음의 한줄로 가능하였다. 오늘도 더 간단한 코드를 배운다. 

 

return len(set(s))

 

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