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#163586#7106. Infinite Parenthesis Sequenceucup-team004WA 1911ms3764kbC++202.9kb2023-09-04 11:45:172023-09-04 11:45:17

Judging History

你现在查看的是最新测评结果

  • [2023-09-04 11:45:17]
  • 评测
  • 测评结果:WA
  • 用时:1911ms
  • 内存:3764kb
  • [2023-09-04 11:45:17]
  • 提交

answer

#include <bits/stdc++.h>

using i64 = long long;

constexpr int N = 1E5;

int fen[N];

void add(int x, int y) {
    for (int i = x + 1; i <= N; i += i & -i) {
        fen[i - 1] += y;
    }
}

int sum(int x) {
    int ans = 0;
    for (int i = x; i; i &= i - 1) {
        ans += fen[i - 1];
    }
    return ans;
}

void solve() {
    std::string s;
    std::cin >> s;
    // std::mt19937 rng;
    // for (int i = 0; i < 100000; i++) {
    //     s += (rng() % 2 ? ')' : '(');
    // }
    
    int n = s.size();
    
    int cnt = std::count(s.begin(), s.end(), '(');
    // std::cerr << "cnt : " << cnt << "\n";
    bool rev = false;
    if (cnt > n / 2) {
        rev = true;
        std::reverse(s.begin() + 1, s.end());
        for (auto &c : s) {
            c ^= '(' ^ ')';
        }
    }
    
    std::fill(fen, fen + n, 0);
    
    int q;
    std::cin >> q;
    
    std::vector<std::array<i64, 4>> qry(q);
    for (int i = 0; i < q; i++) {
        int k, l, r;
        std::cin >> k >> l >> r;
        if (rev) {
            l *= -1;
            r *= -1;
            std::swap(l, r);
        }
        r++;
        qry[i] = {k, l, r, i};
    }
    std::vector<int> ans(q);
    std::sort(qry.begin(), qry.end());
    std::vector<int> pre(n + 1);
    for (int i = 0; i < n; i++) {
        pre[i + 1] = pre[i] + (s[i] == '(' ? 1 : -1);
    }
    int b = std::max_element(pre.begin(), pre.end()) - pre.begin();
    std::rotate(s.begin(), s.begin() + b, s.end());
    
    std::vector<int> pos;
    for (int i = n - 1; i >= 0; i--) {
        if (s[i] == '(') {
            pos.push_back(i + 2 * pos.size());
        }
    }
    const int C = pos.size();
    std::vector<int> L(C, -1), R(C, C);
    std::vector<int> stk;
    for (int i = 0; i < C; i++) {
        while (!stk.empty() && pos[i] < pos[stk.back()]) {
            R[stk.back()] = i;
            stk.pop_back();
        }
        L[i] = stk.empty() ? -1 : stk.back();
        stk.push_back(i);
    }
    auto get = [&](i64 x, i64 k) {
        i64 v = x / n;
        if (x - v * n < 0) {
            v -= 1;
        }
        i64 ans = 1LL * cnt * v;
        x -= v * n;
        // ans += sum(x);
        for (int i = 0; i < C; i++) {
            int v = pos[i];
            for (int j = std::max(0LL, i - k); j <= i; j++) {
                v = std::min(v, pos[j]);
            }
            v -= 2 * i;
            ans += (v < x);
        }
        return ans;
    };
    for (auto [k, l, r, i] : qry) {
        l -= k;
        r -= k;
        l -= b;
        r -= b;
        ans[i] = get(r, k) - get(l, k);
    }
    for (int i = 0; i < q; i++) {
        std::cout << ans[i] << "\n";
    }
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int t;
    std::cin >> t;
    
    while (t--) {
        solve();
    }
    
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3552kb

input:

3
(())
3
0 -3 2
1 -2 3
2 0 0
))()(
3
0 -3 4
2 1 3
3 -4 -1
))()(()(
4
1234 -5678 9012
123 -456 789
12 -34 56
1 -2 3

output:

3
3
0
4
1
1
7345
623
45
3

result:

ok 10 lines

Test #2:

score: -100
Wrong Answer
time: 1911ms
memory: 3764kb

input:

5564
()()(((()
16
0 -825489608 537105171
0 481386502 824237183
0 -32590250 515314371
0 -634830457 908018223
3 -494274112 299679416
125527658 81646800 208166552
632660143 -774899605 -551752339
4 -874787302 127206822
4 -102348267 122390255
2 -881139944 898929361
0 -656262874 -233671414
111787130 -5925...

output:

908396520
228567124
365269751
1028565786
529302353
84346501
148764842
667996081
149825682
1186712873
281727642
995600515
63752580
740373708
867951695
27044669
530591270
345487788
415550917
701803793
413364407
187916465
386485770
125057027
296666742
470522532
367131179
635722815
58970215
379425066
18...

result:

wrong answer 2nd lines differ - expected: '228567121', found: '228567124'