#include <iostream>
using namespace std;
#define ll long long
ll a[105];

int main() {
	string s = "";
	
	for (ll i = 1; i <= 100; i++)
	{
		s += to_string(i);
	}
	
	ll n; cin >> n;
	string key = "";
	
	for (ll i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	
	for (ll i = 1; i <= n; i++)
	{
		key += s[a[i] - 1];
	}
	cout << key;
	
	
}