题解 | 单组_字符串

package main

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

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n int
	var s string
	m, _ := reader.ReadString('\n')
	n, _ = strconv.Atoi(strings.TrimSpace(m))//要习惯使用reader.ReadString('\n')后删除空格和换行弥补报错，但是容易出事故
	s, _ = reader.ReadString('\n')
	s = strings.TrimSpace(s)
	runes := []rune(s)
	for i := 0; i < n/2; i++ {
		runes[i], runes[n-1-i] = runes[n-1-i], runes[i]
	}
	fmt.Println(string(runes))

}