题解 | #数字颠倒#

package main

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

func main() {
	in := bufio.NewScanner(os.Stdin)
	in.Scan()
	b := in.Bytes()
	ret := make([]byte, len(b))
	for i := len(b) - 1; i >= 0; i-- {
		ret[len(b)-1-i] = b[i]
	}
	fmt.Println(string(ret))
}