#include<bits/stdc++.h>
using namespace std;
#define i64 long long
#define i128 __int128
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()
void Solve(void) {
int N; cin >> N;
int tot = 0;
for (int i = 1; i <= N; i ++) {
int X; cin >> X;
int p = X % 10; X /= 10;
int ans = 1;
for (int j = 1; j <= p; j ++) ans = ans * X;
tot = tot + ans;
}
cout << tot << "\n";
}
signed main() {
ios_base::sync_with_stdio(false); cin.tie(0);
cout << fixed << setprecision(10);
int Tests = 1; // cin >> Tests;
while (Tests --) {
Solve();
}
}
