#include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; using ll = long long; class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x ostream& operator<<(ostream& os, const pair& p){ return os << "{" << p.first << ", " << p.second << "}"; } template ostream& operator<<(ostream& os, const vector& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } template ostream& operator<<(ostream& os, const set& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } template ostream& operator<<(ostream& os, const map& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } #ifdef ONLINE_JUDGE #define dump(expr) ; #else #define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; } #endif ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; } void solve() { string s; cin >> s; int n = (int)s.size(); for (char c : s) if (c != s[0]) goto NORMAL; cout << s << endl; return; NORMAL: vector exists(10); for (char c : s) exists[c - '0'] = 1; int g = 0; for (int i : range(10)) if (exists[i]) for (int j : range(i)) if (exists[j]) { g = gcd(g, abs(i - j)); } dump(9 * g); auto takemod = [&](int mod) -> int { int r = 0; for (int i = n - 1; i >= 0; --i) { r *= 10; r += s[i] - '0'; r %= mod; } return r; }; int res = 1; vector cand = {3, 9, 27, 81, 2, 4, 8, 5, 7}; for (int mod : cand) { if ((9 * g) % mod == 0 && takemod(mod) == 0) res = lcm(res, mod); } cout << res << endl; } int main() { cout << fixed << setprecision(12); solve(); }