题解 | 表示数字

package main

import (
	"fmt"
	"strings"
	"unicode"
)

func main() {
    var s string
    fmt.Scan(&s)
    count := 0
    var sb strings.Builder
    for i, c := range s {
        if unicode.IsDigit(c) {
            if count == 0 {
                sb.WriteString("*" + string(c))
            } else {
                sb.WriteString(string(c))
            }
            count++
        } else {
            if count > 0 {
                sb.WriteString("*" + string(c))
            } else {
                sb.WriteString(string(c)) 
            }
            count = 0
        }
        if unicode.IsDigit(c) && i == len(s)-1{
            sb.WriteString("*")
        }
    }
    fmt.Println(sb.String())
}