HJ11数字颠倒.md

package main

import (
    "fmt"
    "strconv"
)

func main() {
    var n int
    fmt.Scan(&n)
    ss := []byte(strconv.Itoa(n))
    i, j := 0, len(ss)-1
    for i < j {
        ss[i], ss[j] = ss[j], ss[i]
        i++
        j--
    }
    fmt.Print(string(ss))
}