oj.uz

답안 #897822

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
897822 2024-01-03T18:14:00 Z box Amusement Park (JOI17_amusement_park) C++17
10 / 100
 18 ms 3816 KB 
#include "Joi.h"
#include <bits/stdc++.h>

using std::cerr, std::endl;

#ifdef LOCAL
template <class T, class... U> void bug_h(const T& t, const U&... u) { cerr << t; ((cerr << " | " << u), ...); cerr << endl; }
#define bug(...) cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: ", bug_h(__VA_ARGS__)
#else
#define cerr if (0) cerr
#define bug(...)
#endif

#define ar array
#define all(v) std::begin(v), std::end(v)
#define sz(v) int(std::size(v))
typedef long long i64;
typedef std::vector<int> vi;

namespace {

vi uf;

int find(int i) {
    return uf[i] == i ? i : uf[i] = find(uf[i]);
}
bool join(int i, int j) {
    i = find(i), j = find(j);
    if (i == j) return 0;
    uf[i] = uf[j] = i;
    return 1;
}

}

void Joi(int N, int M, int A[], int B[], long long X, int T) {
    uf.resize(N);
    std::iota(all(uf), 0);
    std::vector<vi> adj(N);
    for (int i = 0; i < M; i++) if (join(A[i], B[i])) {
        adj[A[i]].push_back(B[i]);
        adj[B[i]].push_back(A[i]);
    }
    vi dist(N, -1);
    vi parent(N, -1);
    auto bfs = [&](int i) {
        std::fill(all(dist), -1);
        std::queue<int> qu;
        dist[i] = 0; qu.push(i);
        while (sz(qu)) {
            int i = qu.front(); qu.pop();
            for (int j : adj[i]) if (dist[j] == -1) {
                dist[j] = dist[i] + 1;
                parent[j] = i;
                qu.push(j);
            }
        }
    };
    bfs(0);
    int u = std::max_element(all(dist)) - std::begin(dist);
    bfs(u);
    int v = std::max_element(all(dist)) - std::begin(dist);
    if (dist[v] >= 59) {
        for (int i = 0; i < N; i++)
            MessageBoard(i, X >> (dist[i] % 60) & 1);
    } else {
        vi par = parent;
        vi diameter = {v};
        while (diameter.back() != u) diameter.push_back(par[diameter.back()]);
        std::fill(all(dist), -1);
        vi qu = diameter;
        for (int x : diameter) dist[x] = 0;
        for (int i = 0; i < sz(qu); i++) {
            int u = qu[i];
            for (int v : adj[u]) if (dist[v] == -1) {
                dist[v] = dist[u] + 1;
                qu.push_back(v);
            }
        }
        assert(sz(qu) >= 60);
        qu.resize(60);
        vi color(N);
        for (int i = 0; i < 60; i++) {
            color[qu[i]] = X >> i & 1;
            bug(qu[i], i, X >> i & 1);
        }
        for (int i = 0; i < N; i++) MessageBoard(i, color[i]);
    }
}

#include "Ioi.h"
#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
template <class T, class... U> void bug_h(const T& t, const U&... u) { cerr << t; ((cerr << " | " << u), ...); cerr << endl; }
#define bug(...) cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: ", bug_h(__VA_ARGS__)
#else
#define cerr if (0) cerr
#define bug(...)
#endif

#define ar array
#define all(v) std::begin(v), std::end(v)
#define sz(v) int(std::size(v))
typedef long long i64;
typedef vector<int> vi;
typedef pair<int, int> pi;

namespace {

vi uf;

int find(int i) {
    return uf[i] == i ? i : uf[i] = find(uf[i]);
}
bool join(int i, int j) {
    i = find(i), j = find(j);
    if (i == j) return 0;
    uf[i] = uf[j] = i;
    return 1;
}

}

long long Ioi(int N, int M, int A[], int B[], int P, int V, int T) {
    uf.resize(N);
    iota(all(uf), 0);
    vector<vi> adj(N);
    for (int i = 0; i < M; i++) if (join(A[i], B[i])) {
        adj[A[i]].push_back(B[i]);
        adj[B[i]].push_back(A[i]);
    }
    vi dist(N, -1);
    vi parent(N, -1);
    vi child(N, -1);
    auto bfs = [&](int i) {
        fill(all(dist), -1);
        queue<int> qu;
        dist[i] = 0; qu.push(i);
        while (sz(qu)) {
            int i = qu.front(); qu.pop();
            for (int j : adj[i]) if (dist[j] == -1) {
                child[i] = j;
                dist[j] = dist[i] + 1;
                parent[j] = i;
                qu.push(j);
            }
        }
    };
    bfs(0);
    int u = max_element(all(dist)) - begin(dist);
    bfs(u);
    int v = max_element(all(dist)) - begin(dist);
    auto save = dist;
    if (dist[v] >= 59) {
        i64 X = i64(V) << (dist[P] % 60);
        if (dist[P] >= 59) {
            for (int it = 0; it < 59; it++) {
                P = parent[P];
                X |= i64(Move(P)) << (dist[P] % 60);
            }
        } else {
            while (P != u) {
                P = parent[P];
                X |= i64(Move(P)) << (dist[P] % 60);
            }
            for (int it = 0; it < 59; it++) {
                P = child[P];
                X |= i64(Move(P)) << (dist[P] % 60);
            }
        }
        return X;
    } else {
        vi diameter = {v};
        vector<pi> edges;
        vi par = parent;
        while (diameter.back() != u) {
            int v = diameter.back();
            edges.push_back({v, par[v]});
            diameter.push_back(par[v]);
        }
        fill(all(par), -1);
        fill(all(dist), -1);
        vi qu = diameter;
        for (int x : diameter) dist[x] = 0;
        for (int i = 0; i < sz(qu); i++) {
            int u = qu[i];
            for (int v : adj[u]) if (dist[v] == -1) {
                dist[v] = dist[u] + 1;
                par[v] = u;
                if (sz(qu) < 60)
                    edges.push_back({u, v});
                qu.push_back(v);
            }
        }
        assert(sz(qu) >= 60);
        vi index(N, -1);
        for (int i = 0; i < 60; i++) {
            index[qu[i]] = i;
            // bug(qu[i], i);
        }
        i64 X = 0;
        if (dist[P] == 0) {
            X |= i64(V) << index[P];
        }
        while (dist[P] != 0) {
            P = par[P];
            assert(~P);
            int x = Move(P);
            if (dist[P] == 0) {
                bug(x, index[P]);
                X |= i64(x) << index[P];
            }
            bug(P, dist[P]);
        }
        assert(sz(edges) == 59);
        vector<vi> adj(N);
        for (auto [i, j] : edges) {
            if (i == 5 || j == 5) bug(i, j);
            adj[i].push_back(j), adj[j].push_back(i);
        }
        int last = save[P] * 2 > save[v] ? u : v;
        vector<bool> has(N);
        auto dfs = [&](auto dfs, int i) -> bool {
            has[i] = i == last; int who = -1;
            for (int j : adj[i]) {
                adj[j].erase(find(all(adj[j]), i));
                if (dfs(dfs, j)) {
                    has[i] = 1;
                    who = j;
                }
            }
            if (has[i] && sz(adj[i])) {
                assert(~who);
                int pos = find(all(adj[i]), who) - begin(adj[i]);
                swap(adj[i][pos], adj[i].back());
            }
            return has[i];
        };
        dfs(dfs, P);
        int cnt = 0;
        i64 Y = 0;
        bug(P);
        auto make = [&](auto make, int i) -> void {
            ++cnt;
            for (int j : adj[i]) {
                bug(j, index[j]);
                Y |= i64(1) << index[j];
                int v = Move(j);
                X |= i64(v) << index[j];
                // if (v) bug(j, index[j]);
                make(make, j);
                if (!has[j]) Move(i);
            }
        };
        make(make, P);
        bug(cnt);
        bug(Y);
        return X;
    }
}

Subtask #1
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 784 KB Output is correct
2 Correct 1 ms 788 KB Output is correct
3 Correct 1 ms 796 KB Output is correct
4 Incorrect 0 ms 800 KB Wrong Answer [6]
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 3652 KB Output is correct
2 Incorrect 16 ms 3700 KB Wrong Answer [6]
3 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 796 KB Output is correct
2 Correct 1 ms 876 KB Output is correct
3 Correct 1 ms 792 KB Output is correct
4 Correct 2 ms 1088 KB Output is correct
5 Correct 2 ms 1340 KB Output is correct
6 Correct 2 ms 1352 KB Output is correct
7 Correct 2 ms 1092 KB Output is correct
8 Correct 2 ms 1088 KB Output is correct
9 Correct 8 ms 3148 KB Output is correct
10 Correct 12 ms 3148 KB Output is correct
11 Correct 9 ms 3152 KB Output is correct
12 Correct 0 ms 788 KB Output is correct
13 Correct 0 ms 1060 KB Output is correct
14 Correct 0 ms 796 KB Output is correct
15 Correct 1 ms 796 KB Output is correct

Subtask #4
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 3660 KB Output is correct
2 Correct 16 ms 3656 KB Output is correct
3 Correct 16 ms 3648 KB Output is correct
4 Correct 13 ms 3404 KB Output is correct
5 Incorrect 10 ms 3148 KB Wrong Answer [6]
6 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 3644 KB Output is correct
2 Correct 18 ms 3644 KB Output is correct
3 Correct 16 ms 3648 KB Output is correct
4 Correct 11 ms 3508 KB Output is correct
5 Correct 10 ms 3144 KB Output is correct
6 Correct 11 ms 3148 KB Output is correct
7 Correct 12 ms 3148 KB Output is correct
8 Correct 11 ms 3152 KB Output is correct
9 Correct 11 ms 3148 KB Output is correct
10 Correct 9 ms 3648 KB Output is correct
11 Correct 9 ms 3420 KB Output is correct
12 Correct 10 ms 3416 KB Output is correct
13 Correct 9 ms 3420 KB Output is correct
14 Correct 11 ms 3492 KB Output is correct
15 Correct 11 ms 3816 KB Output is correct
16 Correct 11 ms 3396 KB Output is correct
17 Correct 12 ms 3420 KB Output is correct
18 Correct 11 ms 3532 KB Output is correct
19 Correct 11 ms 3448 KB Output is correct
20 Correct 8 ms 3144 KB Output is correct
21 Correct 8 ms 3140 KB Output is correct
22 Correct 11 ms 3140 KB Output is correct
23 Correct 11 ms 3144 KB Output is correct
24 Correct 11 ms 3128 KB Output is correct
25 Correct 10 ms 3148 KB Output is correct
26 Correct 11 ms 3136 KB Output is correct
27 Correct 11 ms 3152 KB Output is correct
28 Correct 10 ms 3136 KB Output is correct
29 Correct 10 ms 2644 KB Output is correct
30 Correct 13 ms 2656 KB Output is correct
31 Correct 1 ms 800 KB Output is correct
32 Correct 1 ms 800 KB Output is correct
33 Correct 1 ms 796 KB Output is correct
34 Correct 2 ms 800 KB Output is correct
35 Incorrect 0 ms 884 KB Wrong Answer [6]
36 Halted 0 ms 0 KB -