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package largest_number
import (	"sort"	"strconv"	"strings")
func largestNumber(nums []int) string {	strs := MapSlice(nums, strconv.Itoa)	sort.Slice(strs, func(i, j int) bool {
		a := strs[i]		b := strs[j]		return -ParseInt((a)+(b))+ParseInt((b)+(a)) < 0	})
	if strs[0] == "0" {		return "0"	}	return strings.Join(strs, "")}func MapSlice(vs []int, f func(int) string) []string {	vsm := make([]string, len(vs))	for i, v := range vs {		vsm[i] = f(v)	}	return vsm}
func ParseInt(s string) int {	i, e := strconv.Atoi(s)	if e != nil {		panic(e)	}	return i}