题解 | #单词倒排#

package main

import (
    "bufio"
    "fmt"
    "os"
    "strings"
)

func main() {
    bs := bufio.NewScanner(os.Stdin)
    for bs.Scan() {
        input := bs.Text()
        ret := ""
        for _, i := range input {
            switch {
            case i >= 'A' && i <= 'Z':
                ret = ret + string(i)
            case i >= 'a' && i <= 'z':
                ret = ret + string(i)
            default:
                ret = ret + "|"
            }
        }
        rets := strings.Split(ret, "|")
        l := len(rets)
        res := ""
        for i := l - 1; i >= 0; i-- {
            if rets[i] == "" {
                continue
            } else {
                if res == "" {
                    res = rets[i]
                } else {
                    res = res + " " + rets[i]
                }
            }

        }
        fmt.Println(res)
    }
}