package main
import (
    "fmt"
    "io"
)

func main() {
    var randNum int
    for {
        _,err := fmt.Scan(&randNum)
        if err == io.EOF {
            break
        }
        var numSlice []int
        for i:=0;i<randNum;i++ {
            var num int
            fmt.Scan(&num)
            numSlice = append(numSlice,num)
        }
        for j := len(numSlice) - 1; j > 0; j-- {

            for i := 0; i < j; i++ {

                if numSlice[i] > numSlice[i+1] {

                    var temp int
                    temp = numSlice[i]
                    numSlice[i] = numSlice[i+1]
                    numSlice[i+1] = temp

                }

            }

        }

        for i:=0;i < len(numSlice);i++ {
            if i == 0 || numSlice[i] != numSlice[i-1] {
                fmt.Println(numSlice[i])
            }
        }

    }

}