oj.uz

답안 #374458

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
374458 2021-03-07T10:01:00 Z KoD 가로등 (APIO19_street_lamps) C++17
100 / 100
 2245 ms 117596 KB 
#include <bits/stdc++.h>

template <class T>
using Vec = std::vector<T>;

struct Fenwick {
    Vec<int> data;
    Fenwick() = default;
    Fenwick(const int n): data(n + 1) { }
    void add(int i, const int x) {
        for (i += 1; i < (int) data.size(); i += i & -i) {
            data[i] += x;
        }   
    }
    int get(int i) const {
        int ret = 0;
        for (i += 1; i > 0; i -= i & -i) {
            ret += data[i];
        }
        return ret;
    }
};

struct Add2D {
    Vec<Vec<int>> pts;
    Vec<Fenwick> fen;
    Add2D(const Vec<int> &x, const Vec<int> &y, const int n) {
        pts.resize(2 * n);
        fen.resize(2 * n);
        for (int i = 0; i < (int) x.size(); ++i) {
            pts[x[i] + n].push_back(y[i]);
        }
        for (int i = n; i < 2 * n; ++i) {
            std::sort(pts[i].begin(), pts[i].end());
        }
        for (int i = n - 1; i > 0; --i) {
            pts[i].reserve(pts[i * 2].size() + pts[i * 2 + 1].size());
            std::copy(pts[i * 2].begin(), pts[i * 2].end(), std::back_inserter(pts[i]));
            std::copy(pts[i * 2 + 1].begin(), pts[i * 2 + 1].end(), std::back_inserter(pts[i]));
            std::inplace_merge(pts[i].begin(), pts[i].begin() + pts[i * 2].size(), pts[i].end());
        }
        for (int i = 1; i < 2 * n; ++i) {
            pts[i].erase(std::unique(pts[i].begin(), pts[i].end()), pts[i].end());
            fen[i] = Fenwick(pts[i].size());            
        }
    }
    void add(int l, int r, const int d, const int u, const int v) {
        for (l += size(), r += size(); l < r; l >>= 1, r >>= 1) {
            if (l & 1) {
                fen[l].add(std::lower_bound(pts[l].begin(), pts[l].end(), d) - pts[l].begin(), v);
                fen[l].add(std::lower_bound(pts[l].begin(), pts[l].end(), u) - pts[l].begin(), -v);
                l += 1;
            }
            if (r & 1) {
                r -= 1;
                fen[r].add(std::lower_bound(pts[r].begin(), pts[r].end(), d) - pts[r].begin(), v);
                fen[r].add(std::lower_bound(pts[r].begin(), pts[r].end(), u) - pts[r].begin(), -v);
            }
        }
    }
    int get(int x, const int y) const {
        int ret = 0;
        for (x += size(); x > 0; x >>= 1) {
            ret += fen[x].get(std::lower_bound(pts[x].begin(), pts[x].end(), y) - pts[x].begin());
        }
        return ret;
    }
    int size() const {
        return (int) pts.size() / 2;
    }
};  

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int N, Q;
    std::cin >> N >> Q;
    Vec<int> state(N);
    for (auto &x: state) {
        char c;
        std::cin >> c;
        x = (c == '1');
    }
    std::set<int> off;
    for (int i = 0; i < N; ++i) {
        if (!state[i]) {
            off.insert(i);
        }
    }
    Vec<int> ans, X, Y;
    Vec<std::tuple<int, int, int, int, int>> add;
    Vec<std::pair<int, int>> qs;
    qs.reserve(Q);
    for (int t = 1; t <= Q; ++t) {
        std::string type;
        std::cin >> type;
        if (type == "query") {
            const auto idx = (int) ans.size();
            int a, b;
            std::cin >> a >> b;
            a -= 1;
            b -= 1;
            const auto itr = off.lower_bound(a);
            ans.push_back((itr == off.end() || *itr >= b) ? t : 0);
            X.push_back(a);
            Y.push_back(b);
            qs.emplace_back(idx, true);
        }
        else {
            const auto idx = (int) add.size();
            int s;
            std::cin >> s;
            s -= 1;
            if (off.find(s) == off.end()) {
                off.insert(s);
                const auto itr = off.find(s);
                const auto l = (itr == off.begin() ? 0 : *std::prev(itr) + 1);
                const auto r = (std::next(itr) == off.end() ? N : *std::next(itr));
                add.emplace_back(l, s, s + 1, r, t);
            }
            else {
                const auto itr = off.find(s);
                const auto l = (itr == off.begin() ? 0 : *std::prev(itr) + 1);
                const auto r = (std::next(itr) == off.end() ? N : *std::next(itr));
                add.emplace_back(l, s, s + 1, r, -t);
                off.erase(itr);
            }
            qs.emplace_back(idx, false);
        }
    }
    Add2D rect(X, Y, N + 1);
    for (const auto [i, f]: qs) {
        if (f) {
            ans[i] += rect.get(X[i], Y[i]);
        }
        else {
            const auto [l, r, d, u, v] = add[i];
            rect.add(l, r + 1, d, u + 1, v);
        }
    }
    for (const auto x: ans) {
        std::cout << x << '\n';
    }
    return 0;
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 13940 KB Output is correct
2 Correct 192 ms 14964 KB Output is correct
3 Correct 338 ms 18300 KB Output is correct
4 Correct 1226 ms 89764 KB Output is correct
5 Correct 1338 ms 86620 KB Output is correct
6 Correct 1002 ms 85336 KB Output is correct
7 Correct 2215 ms 112692 KB Output is correct
8 Correct 1930 ms 100032 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 571 ms 57672 KB Output is correct
6 Correct 877 ms 73780 KB Output is correct
7 Correct 1388 ms 87320 KB Output is correct
8 Correct 1973 ms 104884 KB Output is correct
9 Correct 173 ms 13700 KB Output is correct
10 Correct 187 ms 14832 KB Output is correct
11 Correct 201 ms 15540 KB Output is correct
12 Correct 2245 ms 117444 KB Output is correct
13 Correct 1988 ms 104784 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 2185 ms 110172 KB Output is correct
6 Correct 1596 ms 98376 KB Output is correct
7 Correct 1037 ms 85336 KB Output is correct
8 Correct 475 ms 64712 KB Output is correct
9 Correct 220 ms 12244 KB Output is correct
10 Correct 146 ms 12756 KB Output is correct
11 Correct 224 ms 12248 KB Output is correct
12 Correct 143 ms 12780 KB Output is correct
13 Correct 223 ms 12244 KB Output is correct
14 Correct 143 ms 12756 KB Output is correct
15 Correct 2194 ms 117596 KB Output is correct
16 Correct 1940 ms 104924 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 160 ms 13940 KB Output is correct
9 Correct 192 ms 14964 KB Output is correct
10 Correct 338 ms 18300 KB Output is correct
11 Correct 1226 ms 89764 KB Output is correct
12 Correct 1338 ms 86620 KB Output is correct
13 Correct 1002 ms 85336 KB Output is correct
14 Correct 2215 ms 112692 KB Output is correct
15 Correct 1930 ms 100032 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 2 ms 620 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 571 ms 57672 KB Output is correct
21 Correct 877 ms 73780 KB Output is correct
22 Correct 1388 ms 87320 KB Output is correct
23 Correct 1973 ms 104884 KB Output is correct
24 Correct 173 ms 13700 KB Output is correct
25 Correct 187 ms 14832 KB Output is correct
26 Correct 201 ms 15540 KB Output is correct
27 Correct 2245 ms 117444 KB Output is correct
28 Correct 1988 ms 104784 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 620 KB Output is correct
31 Correct 2 ms 620 KB Output is correct
32 Correct 1 ms 492 KB Output is correct
33 Correct 2185 ms 110172 KB Output is correct
34 Correct 1596 ms 98376 KB Output is correct
35 Correct 1037 ms 85336 KB Output is correct
36 Correct 475 ms 64712 KB Output is correct
37 Correct 220 ms 12244 KB Output is correct
38 Correct 146 ms 12756 KB Output is correct
39 Correct 224 ms 12248 KB Output is correct
40 Correct 143 ms 12780 KB Output is correct
41 Correct 223 ms 12244 KB Output is correct
42 Correct 143 ms 12756 KB Output is correct
43 Correct 2194 ms 117596 KB Output is correct
44 Correct 1940 ms 104924 KB Output is correct
45 Correct 93 ms 7804 KB Output is correct
46 Correct 139 ms 8848 KB Output is correct
47 Correct 592 ms 38652 KB Output is correct
48 Correct 1169 ms 90284 KB Output is correct
49 Correct 213 ms 16396 KB Output is correct
50 Correct 210 ms 16192 KB Output is correct
51 Correct 227 ms 17264 KB Output is correct
52 Correct 286 ms 20140 KB Output is correct
53 Correct 288 ms 20300 KB Output is correct
54 Correct 314 ms 20276 KB Output is correct