数据太小了,直接暴力就好了,就算数字增大套个map就好了

package main

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

func main()  {
	var t,n int
	in := bufio.NewReader(os.Stdin)
	sz := make([]int, 505)
	fmt.Fscan(in, &t)
	for i := 0; i<t; i++ {
		fmt.Fscan(in, &n)
		sz[n]=1
	}
	for i := 1; i<=500 ; i++ {
		if sz[i] == 1 {
			fmt.Println(i)
		}
	}

}