oj.uz

Submission #937704

# Submission time Handle Problem Language Result Execution time Memory
937704 2024-03-04T11:39:31 Z zwezdinv Modern Machine (JOI23_ho_t5) C++17
14 / 100
 3000 ms 9040 KB 
#include <bits/stdc++.h>

std::string process(std::string c, int k) {
        // c[k] = 'R';
        // std::vector<int> lr, rl;
        // for (int i = 0; i < k; ++i) {
        //         if (c[i] == 'R') lr.push_back(i);
        // }
        // for (int i = k + 1; i < c.size(); ++i) {
        //         if (c[i] == 'B') rl.push_back(i);
        // }
        // if (lr.size() >= rl.size()) {
        //         int k = rl.size();
        //         int pos = lr[lr.size() - k];
        //         for (int i = pos; i < c.size(); ++i) c[i] = 'B';
        // } else {
        //         int k = lr.size();
        //         int pos = rl[k - 1];
        //         for (int i = 0; i <= pos; ++i) c[i] = 'R';
        // }
        // return c;
        c[k] = 'R';
        while (0 <= k && k < c.size()) {
                if (c[k] == 'R') {
                        c[k] = 'B';
                        k++;
                } else {
                        c[k] = 'R';
                        k--;
                }
        }
        return c;
}

int main() {
        std::cin.tie(nullptr)->sync_with_stdio(false);

        int n, m;
        std::cin >> n >> m;
        std::string c;
        std::cin >> c;
        std::vector<int> a(m);
        for (auto& i : a) std::cin >> i, --i;
        if (n <= 10) {
                int st = 0;
                for (int i = 0; i < n; ++i) {
                        st |= (c[i] == 'R') << i;
                }
                std::vector<std::vector<int>> ss(1 << n, std::vector<int>(n));
                for (int mask = 0; mask < 1 << n; ++mask) {
                        for (int i = 0; i < n; ++i) {
                                int m4sk = mask;
                                int ptr = i;
                                m4sk |= 1 << i;
                                while (0 <= ptr && ptr < n) {
                                        m4sk ^= 1 << ptr;
                                        if (~m4sk >> ptr & 1) {
                                                ptr++;
                                        } else {
                                                ptr--;
                                        }
                                }
                                ss[mask][i] = m4sk;
                        }
                }
                std::vector<int> qq(1 << n, -1);
                std::vector<int> pos(m, -1);
                std::vector<int> leader(m, -1);
                std::vector<std::vector<std::pair<int, int>>> que(m);
                int q;
                std::cin >> q;
                std::vector<int> ans(q);
                for (int i = 0; i < q; ++i) {
                        int l, r;
                        std::cin >> l >> r;
                        --l, --r;
                        que[r].emplace_back(l, i);
                }
                auto get = [&](int u) -> int {
                        while (u != leader[u]) u = leader[u] = leader[leader[u]];
                        return u;
                }; 
                for (int i = 0; i < m; ++i) {
                        if (qq[st] == -1) {
                                qq[st] = i;
                                pos[i] = st;
                                leader[i] = i;
                        } else {
                                leader[i] = qq[st];
                        }
                        std::vector<int> nw(1 << n, -1);
                        for (int j = 0; j < 1 << n; ++j) {
                                if (qq[j] == -1) continue;
                                int k = ss[j][a[i]];
                                if (nw[k] != -1) {
                                        leader[qq[j]] = nw[k];
                                } else {
                                        nw[k] = qq[j];
                                        pos[qq[j]] = k;
                                }
                        }
                        qq = nw;
                        for (auto [l, id] : que[i]) {
                                ans[id] = __builtin_popcount(pos[get(l)]);
                        }
                }
                for (auto i : ans) std::cout << i << '\n';
        } else {
                int q;
                std::cin >> q;
                int l, r;
                std::cin >> l >> r;
                --l, --r;
                for (int i = l; i <= r; ++i) {
                        c = process(c, a[i]);
                }
                std::cout << std::count(c.begin(), c.end(), 'R');
        }
}

Compilation message

Main.cpp: In function 'std::string process(std::string, int)':
Main.cpp:23:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         while (0 <= k && k < c.size()) {
      |                          ~~^~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 360 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 360 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 58 ms 348 KB Output is correct
11 Correct 213 ms 344 KB Output is correct
12 Execution timed out 3051 ms 348 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 360 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 58 ms 348 KB Output is correct
11 Correct 213 ms 344 KB Output is correct
12 Execution timed out 3051 ms 348 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 134 ms 7268 KB Output is correct
3 Correct 145 ms 7540 KB Output is correct
4 Correct 129 ms 7076 KB Output is correct
5 Correct 139 ms 9040 KB Output is correct
6 Correct 129 ms 6304 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 134 ms 7268 KB Output is correct
3 Correct 145 ms 7540 KB Output is correct
4 Correct 129 ms 7076 KB Output is correct
5 Correct 139 ms 9040 KB Output is correct
6 Correct 129 ms 6304 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 6 ms 348 KB Output is correct
10 Execution timed out 3050 ms 348 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 134 ms 7268 KB Output is correct
3 Correct 145 ms 7540 KB Output is correct
4 Correct 129 ms 7076 KB Output is correct
5 Correct 139 ms 9040 KB Output is correct
6 Correct 129 ms 6304 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Incorrect 0 ms 348 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 360 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 5 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 58 ms 348 KB Output is correct
11 Correct 213 ms 344 KB Output is correct
12 Execution timed out 3051 ms 348 KB Time limit exceeded
13 Halted 0 ms 0 KB -