题解 | #字符个数统计 set() 去掉重复字符
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
''' string=str(input()) l=[] for i in string: if i not in l: l.append(i) #print(l) print(len(l)) ''' print(len(set(input().replace('\n','')))) # set 集合,会自动清除重复字符。