题解 | #扭蛋机#

package main

import (
	"fmt"
)

func reverseString(s string) string {
	runes := []rune(s)
	for from, to := 0, len(runes)-1; from < to; from, to = from+1, to-1 {
		runes[from], runes[to] = runes[to], runes[from]
	}
	return string(runes)
}

func main() {
	n := 0
	_, _ = fmt.Scan(&n)
    // fmt.Println(n)
	res := ""

	for n > 0 {
		if n%2 == 0 {
			n = (n - 2) / 2
			res += "3"
		} else {
			n = (n - 1) / 2
			res += "2"
		}
	}
	
    fmt.Println(reverseString(res))
}