algo.go

package main

import (
	"fmt"
)

func up(a int) int {
	if a >= 10 {
		return a / 10
	} else {
		return a
	}
}

func main(){
	var y int
	var n, n2, n3 [10]int
	
	var out, out2 int64

	fmt.Scan(&y)

	
	for i := 0; i < y ; i ++ {
		fmt.Scan(&n[i])
		if n[i] >= 10 {
			n2[i] = n[i] / 10
		} else {
			n2[i] = n[i]
		}
		n3[i] = n[i] % 10
	}

	for i := 0; i < y - 1; i++ {
		for j := i+1; j < y; j++ {
			if n2[i] > n2[j] || (n2[i] == n2[j] && n3[i] > n3[j]){
				n[i], n[j] = n[j], n[i]
				n2[i], n2[j] = n2[j], n2[i]
				n3[i], n3[j] = n3[j], n3[i]
			}
		}
	}

	out = 0
	for i := 0 ; i < y ; i ++ {
		if n[i] >= 10 {
			out *= 10
		}
		out *= 10
		out += int64(n[i])
	}
	
	out2 = 0
	for i := y - 1 ; i >= 0 ; i -- {
		if n[i] >= 10 {
			out2 *= 10
		}
		out2 *= 10
		out2 += int64(n[i])
	}

	fmt.Printf("%d", out + out2)
}