Submission #937697

#	Time	Username	Problem	Language	Result	Execution time	Memory
937697		zwezdinv	Modern Machine (JOI23_ho_t5)	C++17	11 / 100	3096 ms	10208 KiB

Main

#include <bits/stdc++.h>

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

        int n, m;
        std::cin >> n >> m;
        std::string c;
        std::cin >> c;
        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> a(m);
        for (auto& i : a) std::cin >> i, --i;
        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';
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 12
• Subtask 3: 0 / 10
• Subtask 4: 11 / 11
• Subtask 5: 0 / 26
• Subtask 6: 0 / 17
• Subtask 7: 0 / 21