Code Signal_练习题_differentSymbolsNaive

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.

我的解答：

def differentSymbolsNaive(s):
    return len(set(s))

一模一样

膜拜大佬