#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
ull fac[] = {1ull, 1ull, 2ull, 6ull, 24ull, 120ull, 720ull, 5040ull, 40320ull, 362880ull, 3628800ull, 39916800ull, 479001600ull, 6227020800ull, 87178291200ull, 1307674368000ull, 20922789888000ull, 355687428096000ull, 6402373705728000ull, 121645100408832000ull};
ull _11[] = {1ull, 1ull, 11ull, 111ull, 1111ull, 11111ull, 111111ull, 1111111ull, 11111111ull, 111111111ull, 1111111111ull, 11111111111ull, 111111111111ull, 1111111111111ull, 11111111111111ull, 111111111111111ull, 1111111111111111ull, 11111111111111111ull, 111111111111111111ull, 1111111111111111111ull};
int main()
{
    int n, num[10];
    while (scanf("%d", &n), n)
    {
        memset(num, 0, sizeof(num));
        int sum = 0;
        for (int i = 0, x; i < n; i++)
            scanf("%d", &x), num[x]++, sum += x;
        ull ans = fac[n];
        for (int i = 0; i < 10; i++)
            ans /= fac[num[i]];
        printf("%lld\n", ans * sum * _11[n] / n);
    }
    return 0;
}