oj.uz

답안 #897826

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
897826 2024-01-03T18:16:01 Z box Amusement Park (JOI17_amusement_park) C++17
10 / 100
 18 ms 3864 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 && P < N);
            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]) {
                assert(~i && i < N);
                assert(~j && j < N);
                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 780 KB Output is correct
2 Correct 0 ms 784 KB Output is correct
3 Correct 0 ms 796 KB Output is correct
4 Incorrect 0 ms 796 KB Wrong Answer [6]
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 3204 KB Output is correct
2 Incorrect 16 ms 3196 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 784 KB Output is correct
2 Correct 0 ms 796 KB Output is correct
3 Correct 0 ms 784 KB Output is correct
4 Correct 2 ms 1336 KB Output is correct
5 Correct 2 ms 1072 KB Output is correct
6 Correct 2 ms 1076 KB Output is correct
7 Correct 2 ms 1328 KB Output is correct
8 Correct 2 ms 1332 KB Output is correct
9 Correct 8 ms 2820 KB Output is correct
10 Correct 8 ms 2816 KB Output is correct
11 Correct 8 ms 2816 KB Output is correct
12 Correct 0 ms 792 KB Output is correct
13 Correct 1 ms 792 KB Output is correct
14 Correct 0 ms 796 KB Output is correct
15 Correct 0 ms 796 KB Output is correct

Subtask #4
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 3356 KB Output is correct
2 Correct 18 ms 3864 KB Output is correct
3 Correct 16 ms 3204 KB Output is correct
4 Correct 12 ms 3304 KB Output is correct
5 Incorrect 10 ms 2936 KB Wrong Answer [6]
6 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 3204 KB Output is correct
2 Correct 17 ms 3212 KB Output is correct
3 Correct 16 ms 3200 KB Output is correct
4 Correct 11 ms 3296 KB Output is correct
5 Correct 11 ms 2804 KB Output is correct
6 Correct 11 ms 2812 KB Output is correct
7 Correct 10 ms 2816 KB Output is correct
8 Correct 11 ms 2812 KB Output is correct
9 Correct 11 ms 2804 KB Output is correct
10 Correct 9 ms 3312 KB Output is correct
11 Correct 9 ms 3320 KB Output is correct
12 Correct 9 ms 3236 KB Output is correct
13 Correct 9 ms 3288 KB Output is correct
14 Correct 11 ms 3288 KB Output is correct
15 Correct 11 ms 3212 KB Output is correct
16 Correct 11 ms 3312 KB Output is correct
17 Correct 11 ms 3336 KB Output is correct
18 Correct 11 ms 3316 KB Output is correct
19 Correct 11 ms 3332 KB Output is correct
20 Correct 8 ms 2812 KB Output is correct
21 Correct 7 ms 2820 KB Output is correct
22 Correct 10 ms 2816 KB Output is correct
23 Correct 14 ms 2812 KB Output is correct
24 Correct 10 ms 2816 KB Output is correct
25 Correct 10 ms 2820 KB Output is correct
26 Correct 10 ms 2688 KB Output is correct
27 Correct 10 ms 2820 KB Output is correct
28 Correct 10 ms 2816 KB Output is correct
29 Correct 9 ms 2560 KB Output is correct
30 Correct 9 ms 2556 KB Output is correct
31 Correct 0 ms 796 KB Output is correct
32 Correct 0 ms 796 KB Output is correct
33 Correct 1 ms 788 KB Output is correct
34 Correct 0 ms 796 KB Output is correct
35 Incorrect 0 ms 796 KB Wrong Answer [6]
36 Halted 0 ms 0 KB -