#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main() {
  int N;
  while (cin >> N) {
    vector<int> T(N);
    for (auto& t : T) cin >> t;

    vector<int64_t> dyn(100);
    dyn[0] = 1;
    for (auto& t : T) {
      vector<int64_t> dyn2(100);
      for (int x = 0; x < 100; x++) if (dyn[x])
      for (int y = 0; y < 100; y++) {
        if (y >= t || (x%10)*10+(y/10) >= t || (x%10)*10+(y%10) >= t) continue;
        dyn2[y] += dyn[x];
      }
      dyn.swap(dyn2);
    }

    int64_t ret = 1;
    for (auto t : T) ret *= t;
    for (auto d : dyn) ret -= d;
    cout << ret << endl;
  }
}