function Main(input) {
    const src = input.split("\n");
    const arr = src[1].split(" ");
    let ans = "";
    for (let i = 9; i >= 1; i--) {
        let c = parseInt(arr[i - 1]);
        if (c) {
            for (let j = 0; j < c; j++) {
                ans = ans + i;
            }
        }
    }
    console.log(ans);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));