题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import java.util.Scanner
fun main(args: Array<String>) {
val read = Scanner(System.`in`)
val res = read.nextLine()
val set = HashSet<Char>()
res.forEach {
set.add(it)
}
println(set.size)
}
