#ifndef HIDDEN_IN_VS // 折りたたみ用 // 警告の抑制 #define _CRT_SECURE_NO_WARNINGS // ライブラリの読み込み #include using namespace std; // 型名の短縮 using ll = long long; // -2^63 ~ 2^63 = 9 * 10^18(int は -2^31 ~ 2^31 = 2 * 10^9) using pii = pair; using pll = pair; using pil = pair; using pli = pair; using vi = vector; using vvi = vector; using vvvi = vector; using vvvvi = vector; using vl = vector; using vvl = vector; using vvvl = vector; using vvvvl = vector; using vb = vector; using vvb = vector; using vvvb = vector; using vc = vector; using vvc = vector; using vvvc = vector; using vd = vector; using vvd = vector; using vvvd = vector; template using priority_queue_rev = priority_queue, greater>; using Graph = vvi; // 定数の定義 const double PI = acos(-1); const vi DX = { 1, 0, -1, 0 }; // 4 近傍(下,右,上,左) const vi DY = { 0, 1, 0, -1 }; int INF = 1001001001; ll INFL = 4004004003104004004LL; // (int)INFL = 1010931620; double EPS = 1e-15; // 入出力高速化 struct fast_io { fast_io() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(18); } } fastIOtmp; // 汎用マクロの定義 #define all(a) (a).begin(), (a).end() #define sz(x) ((int)(x).size()) #define lbpos(a, x) (int)distance((a).begin(), std::lower_bound(all(a), x)) #define ubpos(a, x) (int)distance((a).begin(), std::upper_bound(all(a), x)) #define Yes(b) {cout << ((b) ? "Yes\n" : "No\n");} #define rep(i, n) for(int i = 0, i##_len = int(n); i < i##_len; ++i) // 0 から n-1 まで昇順 #define repi(i, s, t) for(int i = int(s), i##_end = int(t); i <= i##_end; ++i) // s から t まで昇順 #define repir(i, s, t) for(int i = int(s), i##_end = int(t); i >= i##_end; --i) // s から t まで降順 #define repe(v, a) for(const auto& v : (a)) // a の全要素(変更不可能) #define repea(v, a) for(auto& v : (a)) // a の全要素(変更可能) #define repb(set, d) for(int set = 0; set < (1 << int(d)); ++set) // d ビット全探索(昇順) #define repp(a) sort(all(a)); for(bool a##_perm = true; a##_perm; a##_perm = next_permutation(all(a))) // a の順列全て(昇順) #define smod(n, m) ((((n) % (m)) + (m)) % (m)) // 非負mod #define uniq(a) {sort(all(a)); (a).erase(unique(all(a)), (a).end());} // 重複除去 #define EXIT(a) {cout << (a) << endl; exit(0);} // 強制終了 #define inQ(x, y, u, l, d, r) ((u) <= (x) && (l) <= (y) && (x) < (d) && (y) < (r)) // 半開矩形内判定 // 汎用関数の定義 template inline ll pow(T n, int k) { ll v = 1; rep(i, k) v *= n; return v; } template inline bool chmax(T& M, const T& x) { if (M < x) { M = x; return true; } return false; } // 最大値を更新(更新されたら true を返す) template inline bool chmin(T& m, const T& x) { if (m > x) { m = x; return true; } return false; } // 最小値を更新(更新されたら true を返す) template inline T get(T set, int i) { return (set >> i) & T(1); } // 演算子オーバーロード template inline istream& operator>>(istream& is, pair& p) { is >> p.first >> p.second; return is; } template inline istream& operator>>(istream& is, vector& v) { repea(x, v) is >> x; return is; } template inline vector& operator--(vector& v) { repea(x, v) --x; return v; } template inline vector& operator++(vector& v) { repea(x, v) ++x; return v; } #endif // 折りたたみ用 #if __has_include() #include using namespace atcoder; #ifdef _MSC_VER #include "localACL.hpp" #endif //using mint = modint1000000007; using mint = modint998244353; //using mint = modint; // mint::set_mod(m); namespace atcoder { inline istream& operator>>(istream& is, mint& x) { ll x_; is >> x_; x = x_; return is; } inline ostream& operator<<(ostream& os, const mint& x) { os << x.val(); return os; } } using vm = vector; using vvm = vector; using vvvm = vector; using vvvvm = vector; #endif #ifdef _MSC_VER // 手元環境(Visual Studio) #include "local.hpp" #else // 提出用(gcc) inline int popcount(int n) { return __builtin_popcount(n); } inline int popcount(ll n) { return __builtin_popcountll(n); } inline int lsb(int n) { return n != 0 ? __builtin_ctz(n) : -1; } inline int lsb(ll n) { return n != 0 ? __builtin_ctzll(n) : -1; } inline int msb(int n) { return n != 0 ? (31 - __builtin_clz(n)) : -1; } inline int msb(ll n) { return n != 0 ? (63 - __builtin_clzll(n)) : -1; } inline int msb(__int128 n) { return (n >> 64) != 0 ? (127 - __builtin_clzll((ll)(n >> 64))) : n != 0 ? (63 - __builtin_clzll((ll)(n))) : -1; } #define gcd __gcd #define dump(...) #define dumpel(v) #define dump_list(v) #define dump_mat(v) #define input_from_file(f) #define output_to_file(f) #define Assert(b) { if (!(b)) while (1) cout << "OLE"; } #endif // 一番右の "()" の中身だけ切り出す. pair sep(const string& s) { int n = sz(s); int acc = 0; repir(i, n - 1, 0) { if (s[i] == ')') acc++; else acc--; if (acc == 0) { return make_pair(s.substr(0, i), s.substr(i + 1, n - i - 2)); } else if (acc < 0) return { "", "" }; } return { "", "" }; } map atk_memo; string atk(const string& s) { if (atk_memo.count(s)) return atk_memo[s]; auto [t, u] = sep(s); if (t == "" && u == "") return atk_memo[s] = ""; if (u == "") return atk_memo[s] = t; string u2 = atk(u); auto v = t + "(" + u2 + ")(" + u2 + ")"; return atk_memo[s] = atk(v); } ll naive(string s) { ll hp = 0; while (s != "") { s = atk(s); hp++; } for (auto [s, s2] : atk_memo) { // dump(s, "->", s2); } return hp; } /* ((()(()))) 256 (()(())) 8 ()(()) 3 ((((())))) 65536 (((()))) 16 ((())) 4 (()) 2 () 1 (((()()))) 65536 ((()())) 16 (()()) 4 ()() 2 予想: s t : f(s) + f(t) (s) : 2^f(s) ゴミ s : f(s) + 1 */ //【累乗(切り詰め)】O(log_a(inf)) /* * 非負正数 a, n に対し min(a^n, inf) を返す. */ ll truncated_pow(ll a, ll n, ll inf = INFL) { // verify : https://atcoder.jp/contests/abc322/tasks/abc322_g Assert(a >= 0 && n >= 0); if (n == 0 || a == 1) return 1; if (a == 0) return 0; ll val = 1; for (ll i = 0; i < n; i++) { // val * a >= inf if (val >= (inf + a - 1) / a) { val = inf; break; } val *= a; } return val; } //【括弧列 → 木】O(n) /* * 括弧列 s[0..2n) について,ネスト関係を表した 0 を根とする有向根付き木 g[0..n] を返す. * i 番目の頂点は対応する括弧の組 s[ls[i]] = '(', s[rs[i]] = ')' に対応し,子ほどネストが深いものとする. * ただし ls[0] = -1, rs[0] = 2n とする. */ Graph parenthesis_tree(const string& s, vi* ls = nullptr, vi* rs = nullptr) { // verify : https://atcoder.jp/contests/discovery2016-final/tasks/discovery_2016_final_c int n = sz(s) / 2; Graph g(n + 1); if (ls) ls->resize(n + 1); if (rs) rs->resize(n + 1); int id = 1; stack stk; // ('(' の位置, 木の頂点番号) stk.push({ -1, 0 }); if (ls) (*ls)[0] = -1; if (rs) (*rs)[0] = 2 * n; rep(i, 2 * n) { if (s[i] == '(') { stk.push({ i, id++ }); } else { auto [l, v] = stk.top(); stk.pop(); g[stk.top().second].push_back(v); if (ls) (*ls)[v] = l; if (rs) (*rs)[v] = i; } } return g; } ll solve(string s) { int n = sz(s); ll res = 0; vi acc(n + 1); int l = 0; repir(i, n - 1, 0) { acc[i] = acc[i + 1] + (s[i] == ')' ? 1 : -1); if (acc[i] < 0) chmax(l, i + 1); } repi(i, 0, n) { chmax(l, i); if (acc[i] == 0) break; } dump(acc); if (l > 0) { s.erase(s.begin(), s.begin() + l); acc.erase(acc.begin(), acc.begin() + l); res++; } dump(s); dump(acc); auto g = parenthesis_tree(s); dumpel(g); function dfs = [&](int s) { ll e = 0; repe(t, g[s]) { e += dfs(t); chmin(e, INFL); } ll res = truncated_pow(2, e); dump(s, res); return res; }; repe(t, g[0]) { res += dfs(t); chmin(res, INFL); } return res; } void bug_find() { #ifdef _MSC_VER // 合わない入力例を見つける. mt19937_64 mt; mt.seed((int)time(NULL)); uniform_int_distribution rnd(0, 1); mute_dump = true; repi(n, 1, 11) { repb(set, n) { string s; rep(i, n) s += "()"[get(set, i)]; auto res_naive = naive(s); auto res_solve = solve(s); if (res_naive != res_solve) { cout << "----------error!----------" << endl; cout << "input:" << endl; cout << s << endl; cout << "results:" << endl; cout << res_naive << endl; cout << res_solve << endl; cout << "--------------------------" << endl; } } } mute_dump = false; exit(0); #endif } int main() { input_from_file("input.txt"); // output_to_file("output.txt"); bug_find(); string s; cin >> s; dump(s); dump("-----"); dump(naive(s)); dump("-----"); ll res = solve(s); if (res > (ll)1e18) EXIT("INFTY"); EXIT(res); }