Submission #766092

#	Time	Username	Problem	Language	Result	Execution time	Memory
766092		tengiz05	Werewolf (IOI18_werewolf)	C++17	15 / 100	1298 ms	524288 KiB

werewolf

#include "werewolf.h"
#include "iostream"
#include "array"
#include "queue"
#include "algorithm"
#ifndef EVAL
#include "grader.cpp"
#endif
using namespace std;

constexpr int B = 300;

struct DSUmin {
    int n;
    vector<int> p;
    DSUmin(int n) : n(n), p(n) { for (int i = 0; i < n; i++) p[i] = i; }
    int leader(int u) {
        while (u != p[u]) u = p[u] = p[p[u]];
        return u;
    }
    void merge(int u, int v) {
        u = leader(u);
        v = leader(v);
        if (u == v) return;
        p[v] = u;
    }
};
struct DSU {
    int n;
    vector<int> p, siz;
    vector<vector<int>> f;
    DSU(int n) : n(n), p(n), siz(n), f(n) {
        for (int i = 0; i < n; i++) {
            siz[i] = 1;
            p[i] = i;
            f[i].push_back(i);
        }
    }
    int leader(int u) {
        while (u != p[u]) u = p[u] = p[p[u]];
        return u;
    }
    void merge(int u, int v) {
        u = leader(u);
        v = leader(v);
        if (u == v) return;
        if (siz[v] > siz[u]) swap(u, v);
        for (int x : f[v]) {
            f[u].push_back(x);
        }
        f[v].clear();
        f[v].shrink_to_fit();
        p[v] = u;
    }
};

std::vector<int> check_validity(int n, std::vector<int> X, std::vector<int> Y,
                                std::vector<int> S, std::vector<int> E,
                                std::vector<int> L, std::vector<int> R) {
    int m = X.size();
    vector<vector<int>> e(n);
    for (int i = 0; i < m; i++) {
        e[X[i]].push_back(Y[i]);
        e[Y[i]].push_back(X[i]);
    }
    int Q = S.size();
    vector<int> ans(Q);
    vector<vector<array<int, 4>>> q(n);
    for (int i = 0; i < Q; i++) {
        q[R[i]].push_back({i, S[i], E[i], L[i]});
    }
    DSU dsu(n);
    vector<vector<array<int, 3>>> nq(n);
    for (int i = 0; i < n; i++) {
        for (int j : e[i]) {
            if (j < i) {
                dsu.merge(i, j);
            }
        }
        for (auto [id, s, t, L] : q[i]) {
            for (int x : dsu.f[dsu.leader(t)]) {
                nq[L].push_back({id, s, x});
            }
        }
    }
    DSUmin fastdsu(n);
    for (int i = n - 1; i >= 0; i--) {
        for (int j : e[i]) {
            if (j > i) {
                fastdsu.merge(i, j);
            }
        }
        for (auto [id, s, x] : nq[i]) {
            if (fastdsu.leader(x) == fastdsu.leader(s)) {
                ans[id] = 1;
            }
        }
    }
    return ans;
}

/*


6 6 3
5 1
1 2
1 3
3 4
3 0
5 2
4 2 1 2
4 2 2 2
5 4 3 4



*/

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51