题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
package main
import "fmt"
func main() {
var s string
fmt.Scanf("%s", &s)
m := map[rune]bool{}
for _, v := range s {
if v >= 0 && v <= 127 && v != '\n' {
m[v] = true
}
}
fmt.Printf("%d", len(m))
}
