题解 | #点击消除# | Golang

package main

import (
	"fmt"
)

type Solution struct {}

func (s *Solution) clearStr(input string) string {
    ans := []byte{}
    for _,c := range input {
        if len(ans) != 0 && byte(c) == ans[len(ans)-1] {
            ans = ans[0:len(ans)-1]
            continue
        }
        ans = append(ans, byte(c))
    }
    if len(ans) == 0 {
        return "0"
    }
    return string(ans)
}

func main() {
    input := ""
    fmt.Scan(&input)
    fmt.Print((&Solution{}).clearStr(input))
}