package main

import (
	"fmt"
	"strconv"
)

func main() {
	var n int
	fmt.Scan(&n)

	c := make([]int, 10)
	for i := range make([]struct{}, 9) {
		fmt.Scan(&c[i+1])
	}

	ans := ""
	for i := len(c) - 1; i >= 0; i-- {
		for range make([]struct{}, c[i]) {
			ans += strconv.Itoa(i)
		}
	}
	fmt.Println(ans)
}