結果
問題 | No.1961 Clear Brackets |
ユーザー | tokusakurai |
提出日時 | 2022-08-06 09:39:58 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 52 ms / 2,000 ms |
コード長 | 6,896 bytes |
コンパイル時間 | 2,211 ms |
コンパイル使用メモリ | 208,068 KB |
実行使用メモリ | 11,080 KB |
最終ジャッジ日時 | 2024-09-16 05:31:18 |
合計ジャッジ時間 | 4,569 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 35 ms
10,956 KB |
testcase_15 | AC | 34 ms
10,856 KB |
testcase_16 | AC | 30 ms
10,996 KB |
testcase_17 | AC | 35 ms
10,828 KB |
testcase_18 | AC | 32 ms
10,828 KB |
testcase_19 | AC | 33 ms
11,080 KB |
testcase_20 | AC | 32 ms
10,928 KB |
testcase_21 | AC | 34 ms
10,960 KB |
testcase_22 | AC | 35 ms
10,832 KB |
testcase_23 | AC | 34 ms
10,956 KB |
testcase_24 | AC | 36 ms
10,960 KB |
testcase_25 | AC | 35 ms
10,828 KB |
testcase_26 | AC | 34 ms
10,956 KB |
testcase_27 | AC | 23 ms
10,956 KB |
testcase_28 | AC | 36 ms
10,956 KB |
testcase_29 | AC | 34 ms
10,956 KB |
testcase_30 | AC | 35 ms
10,832 KB |
testcase_31 | AC | 26 ms
10,956 KB |
testcase_32 | AC | 31 ms
10,832 KB |
testcase_33 | AC | 25 ms
10,832 KB |
testcase_34 | AC | 28 ms
10,828 KB |
testcase_35 | AC | 23 ms
10,828 KB |
testcase_36 | AC | 52 ms
10,952 KB |
testcase_37 | AC | 35 ms
10,952 KB |
testcase_38 | AC | 50 ms
10,928 KB |
testcase_39 | AC | 49 ms
10,828 KB |
testcase_40 | AC | 47 ms
10,952 KB |
testcase_41 | AC | 34 ms
10,972 KB |
testcase_42 | AC | 35 ms
10,828 KB |
testcase_43 | AC | 35 ms
10,824 KB |
testcase_44 | AC | 34 ms
10,828 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for (int i = 0; i < n; i++) #define rep2(i, x, n) for (int i = x; i <= n; i++) #define rep3(i, x, n) for (int i = x; i >= n; i--) #define each(e, v) for (auto &e : v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; template <typename T> bool chmax(T &x, const T &y) { return (x < y) ? (x = y, true) : false; } template <typename T> bool chmin(T &x, const T &y) { return (x > y) ? (x = y, true) : false; } template <typename T> int flg(T x, int i) { return (x >> i) & 1; } template <typename T> void print(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' '); if (v.empty()) cout << '\n'; } template <typename T> void printn(const vector<T> &v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << '\n'; } template <typename T> int lb(const vector<T> &v, T x) { return lower_bound(begin(v), end(v), x) - begin(v); } template <typename T> int ub(const vector<T> &v, T x) { return upper_bound(begin(v), end(v), x) - begin(v); } template <typename T> void rearrange(vector<T> &v) { sort(begin(v), end(v)); v.erase(unique(begin(v), end(v)), end(v)); } template <typename T> vector<int> id_sort(const vector<T> &v, bool greater = false) { int n = v.size(); vector<int> ret(n); iota(begin(ret), end(ret), 0); sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; }); return ret; } template <typename S, typename T> pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first + q.first, p.second + q.second); } template <typename S, typename T> pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) { return make_pair(p.first - q.first, p.second - q.second); } template <typename S, typename T> istream &operator>>(istream &is, pair<S, T> &p) { S a; T b; is >> a >> b; p = make_pair(a, b); return is; } template <typename S, typename T> ostream &operator<<(ostream &os, const pair<S, T> &p) { return os << p.first << ' ' << p.second; } struct io_setup { io_setup() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; const int inf = (1 << 30) - 1; const ll INF = (1LL << 60) - 1; const int MOD = 1000000007; // const int MOD = 998244353; template <typename Monoid> struct Segment_Tree { using F = function<Monoid(Monoid, Monoid)>; int n; vector<Monoid> seg; const F f; const Monoid e1; // f(f(a,b),c) = f(a,f(b,c)), f(e1,a) = f(a,e1) = a Segment_Tree(const vector<Monoid> &v, const F &f, const Monoid &e1) : f(f), e1(e1) { int m = v.size(); n = 1; while (n < m) n <<= 1; seg.assign(2 * n, e1); copy(begin(v), end(v), seg.begin() + n); for (int i = n - 1; i > 0; i--) seg[i] = f(seg[2 * i], seg[2 * i + 1]); } Segment_Tree(int m, const Monoid &x, const F &f, const Monoid &e1) : f(f), e1(e1) { n = 1; while (n < m) n <<= 1; seg.assign(2 * n, e1); vector<Monoid> v(m, x); copy(begin(v), end(v), begin(seg) + n); for (int i = n - 1; i > 0; i--) seg[i] = f(seg[2 * i], seg[2 * i + 1]); } void change(int i, const Monoid &x, bool update = true) { if (update) { seg[i + n] = x; } else { seg[i + n] = f(seg[i + n], x); } i += n; while (i >>= 1) seg[i] = f(seg[2 * i], seg[2 * i + 1]); } Monoid query(int l, int r) const { Monoid L = e1, R = e1; l += n, r += n; while (l < r) { if (l & 1) L = f(L, seg[l++]); if (r & 1) R = f(seg[--r], R); l >>= 1, r >>= 1; } return f(L, R); } Monoid operator[](int i) const { return seg[n + i]; } template <typename C> int find_subtree(int i, const C &check, const Monoid &x, Monoid &M, int type) const { while (i < n) { Monoid nxt = type ? f(seg[2 * i + type], M) : f(M, seg[2 * i + type]); if (check(nxt, x)) { i = 2 * i + type; } else { M = nxt; i = 2 * i + (type ^ 1); } } return i - n; } template <typename C> int find_first(int l, const C &check, const Monoid &x) const { // check((区間 [l,r] での演算結果), x) を満たす最小の r Monoid L = e1; int a = l + n, b = n + n; while (a < b) { if (a & 1) { Monoid nxt = f(L, seg[a]); if (check(nxt, x)) return find_subtree(a, check, x, L, 0); L = nxt, a++; } a >>= 1, b >>= 1; } return n; } template <typename C> int find_last(int r, const C &check, const Monoid &x) const { // check((区間 [l,r) での演算結果), x) を満たす最大の l Monoid R = e1; int a = n, b = r + n; while (a < b) { if ((b & 1) || a == 1) { Monoid nxt = f(seg[--b], R); if (check(nxt, x)) return find_subtree(b, check, x, R, 1); R = nxt; } a >>= 1, b >>= 1; } return -1; } }; vector<int> solve(int N, vector<int> a, bool flag) { vector<int> v(N + 1, 0); rep(i, N) { if (a[i] == 1) { v[i + 1] = v[i] + 1; } else { v[i + 1] = v[i] - 1; } } auto f = [](int a, int b) { return min(a, b); }; auto c = [](int a, int b) { return a < b; }; Segment_Tree<int> seg(v, f, inf); vector<int> dp1(N + 1, -inf), dp2(N + 1, -inf); dp1[0] = 0; rep(i, N) { if (a[i] != 1) { chmax(dp1[i + 1], dp1[i]); chmax(dp1[i + 1], dp2[i]); } if (a[i] != -1) { int j = seg.find_first(i + 1, c, v[i + 1]); if (j <= N) { chmax(dp2[j], dp1[i] + 1); chmax(dp2[j], dp2[i]); } } } // print(dp1), print(dp2); if (flag) rep(i, N + 1) chmax(dp1[i], dp2[i]); return dp1; } int main() { int N; string S; cin >> N >> S; vector<int> a(N); rep(i, N) a[i] = (S[i] == '(' ? 1 : S[i] == ')' ? -1 : 0); vector<int> b = a; reverse(all(b)); rep(i, N) b[i] *= -1; // print(a), print(b); auto dp1 = solve(N, a, true); auto dp2 = solve(N, b, false); int ans = -inf; rep2(i, 0, N) chmax(ans, dp1[i] + dp2[N - i]); cout << ans << '\n'; }