#include using namespace std; #define FOR(i,a,b) for(int i=(a);i<(b);i++) #define REP(i,n) FOR(i,0,n) #define ALL(v) (v).begin(),(v).end() template inline bool chmax(A &a, B b) { if (a inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; } typedef unsigned long long ll; typedef pair pii; typedef pair pll; typedef pair P; const ll INF = 1ll<<29; const ll MOD = 1000000007; const double EPS = 1e-10; ll power(ll x, ll n) { if (n == 0) return 1; ll res = power(x * x, n / 2); if (n & 1) res = res * x; return res; } int main() { int n; cin >> n; ll ans = -1; REP(i, n) { string str; cin >> str; REP(j, str.size()) { if (isdigit(str[j])) str[j] = str[j] - '0'; else str[j] = str[j] - 'A' + 10; } int ma = 0; REP(j, str.size()) chmax(ma, str[j]); reverse(ALL(str)); ll now = 0; REP(i, str.size()) now += power(ma + 1, i) * str[i]; chmin(ans, now); } cout << ans << endl; return 0; }