#include <bits/stdc++.h>
#ifdef DBG
#define dbg(expr) \
if (true) { \
cerr << "[" << __FUNCTION__ << ", " << __LINE__ << "] " << #expr << ": " \
<< expr << endl; \
}
#else
#define dbg(...)
#endif
using namespace std;
template <typename T>
ostream& operator<<(ostream& o, vector<T> t) {
o << "{ ";
for (auto& i : t)
o << i << ", ";
o << "}";
return o;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
int k;
cin >> k;
vector<int> b(k);
for (auto& i : b)
cin >> i;
auto check = [&](int s) -> bool {
vector<int> cnts(10);
{
int it = s;
while (it) {
cnts[it % 10]++;
it /= 10;
}
}
dbg(s);
dbg(cnts);
for (int i = s; i < s + k; i++) {
if (!cnts[b[i - s]])
return 0;
if (i % 10 == 9) {
int it = i;
while (it % 10 == 9) {
cnts[9]--;
cnts[0]++;
it /= 10;
}
if (it) {
cnts[it % 10]--;
cnts[(it + 1) % 10]++;
} else {
cnts[1]++;
}
} else {
cnts[i % 10]--;
cnts[(i + 1) % 10]++;
}
dbg(i);
dbg(i + 1);
dbg(cnts);
}
return 1;
};
int i = 0;
while (++i) {
if (check(i)) {
cout << i << '\n';
return 0;
}
}
}
