oj.uz

Submission #897813

# Submission time Handle Problem Language Result Execution time Memory
897813 2024-01-03T18:05:13 Z box Amusement Park (JOI17_amusement_park) C++17
10 / 100
 18 ms 3656 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];
            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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 780 KB Output is correct
2 Correct 0 ms 796 KB Output is correct
3 Correct 0 ms 796 KB Output is correct
4 Incorrect 1 ms 800 KB Wrong Answer [6]
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 3212 KB Output is correct
2 Incorrect 17 ms 3200 KB Wrong Answer [6]
3 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 796 KB Output is correct
2 Correct 0 ms 792 KB Output is correct
3 Correct 1 ms 780 KB Output is correct
4 Correct 2 ms 1336 KB Output is correct
5 Correct 2 ms 1336 KB Output is correct
6 Correct 2 ms 1328 KB Output is correct
7 Correct 2 ms 1328 KB Output is correct
8 Correct 2 ms 1068 KB Output is correct
9 Correct 9 ms 2812 KB Output is correct
10 Correct 10 ms 2820 KB Output is correct
11 Correct 8 ms 2812 KB Output is correct
12 Correct 0 ms 792 KB Output is correct
13 Correct 1 ms 800 KB Output is correct
14 Correct 0 ms 788 KB Output is correct
15 Correct 0 ms 792 KB Output is correct

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3232 KB Output is correct
2 Correct 18 ms 3300 KB Output is correct
3 Correct 18 ms 3344 KB Output is correct
4 Correct 11 ms 3308 KB Output is correct
5 Incorrect 10 ms 3140 KB Wrong Answer [6]
6 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 3348 KB Output is correct
2 Correct 17 ms 3188 KB Output is correct
3 Correct 17 ms 3200 KB Output is correct
4 Correct 11 ms 3308 KB Output is correct
5 Correct 11 ms 3132 KB Output is correct
6 Correct 10 ms 3140 KB Output is correct
7 Correct 11 ms 3132 KB Output is correct
8 Correct 11 ms 3152 KB Output is correct
9 Correct 10 ms 3144 KB Output is correct
10 Correct 10 ms 3656 KB Output is correct
11 Correct 11 ms 3416 KB Output is correct
12 Correct 9 ms 3408 KB Output is correct
13 Correct 9 ms 3416 KB Output is correct
14 Correct 11 ms 3412 KB Output is correct
15 Correct 13 ms 3384 KB Output is correct
16 Correct 14 ms 3392 KB Output is correct
17 Correct 14 ms 3416 KB Output is correct
18 Correct 12 ms 3400 KB Output is correct
19 Correct 11 ms 3416 KB Output is correct
20 Correct 8 ms 3152 KB Output is correct
21 Correct 10 ms 3140 KB Output is correct
22 Correct 11 ms 3132 KB Output is correct
23 Correct 16 ms 3096 KB Output is correct
24 Correct 10 ms 3148 KB Output is correct
25 Correct 10 ms 3144 KB Output is correct
26 Correct 10 ms 3140 KB Output is correct
27 Correct 11 ms 3144 KB Output is correct
28 Correct 10 ms 3152 KB Output is correct
29 Correct 9 ms 2648 KB Output is correct
30 Correct 11 ms 2656 KB Output is correct
31 Correct 0 ms 788 KB Output is correct
32 Correct 1 ms 788 KB Output is correct
33 Correct 1 ms 800 KB Output is correct
34 Correct 0 ms 800 KB Output is correct
35 Incorrect 0 ms 788 KB Wrong Answer [6]
36 Halted 0 ms 0 KB -