Наибольшее число

package main

import "fmt"
import "strconv"

func main() {
        var bubble func(n int, a []int)
    bubble = func(n int, a []int) {
        var bound, i, t int = 0, 0, n - 1

        var combo func(a, b int) int
        combo = func(a, b int) int {
            abt := strconv.Itoa(a) + strconv.Itoa(b)
            bat := strconv.Itoa(b) + strconv.Itoa(a)
            ab, _ := strconv.Atoi(abt)
            ba, _ := strconv.Atoi(bat)
            if ab > ba {
                return 1
            } else {
                return 0
            }
            return 5
        }
        for t > 0 {
            bound, t, i = t, 0, 0
            for i < bound {
                if 0 != combo(a[i+1], a[i]) {
                    a[i+1], a[i] = a[i], a[i+1]
                    t = i
                }
                i++
            }
        }
        return
    }

    var n, x, i int
    fmt.Scanf("%d", &n)
    i = 0
    a := make([]int, 0, 0)

    for i < n {
        fmt.Scanf("%d", &x)
        a = append(a, x)
        i++
    }

    bubble(n, a)

    for _, x := range a {
        fmt.Printf("%d", x)
    }
}