제출 #470257

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
470257		luciocf	Amusement Park (JOI17_amusement_park)	C++14	0 / 100	216 ms	262148 KiB

Joi

#include <bits/stdc++.h>
#include "Joi.h"

using namespace std;

const int maxn_0 = 2e4+10;

static int grau_0[maxn_0], bit_0[maxn_0];

static vector<int> grafo_0[maxn_0], grupo_0[maxn_0];

static set<int> adj_0[maxn_0];

static bool connect_0(int u, int v)
{
    return (adj_0[u].find(v) != adj_0[u].end());
}

static void dfs_0_0(int u, int p)
{
    if (grupo_0[0].size() < 60)
    {
        bit_0[u] = grupo_0[0].size();
        grupo_0[0].push_back(u);
    }

    for (auto v: grafo_0[u])
        if (v != p)
            dfs_0_0(v, u);
}

static void dfs_1(int u, int p)
{
    for (auto v: grafo_0[u])
    {
        if (v == p) continue;

        bool ok = 0;
        for (auto w: grupo_0[u])
            if (w == v)
                ok = 1;

        if (ok)
        {
            for (auto w: grupo_0[u])
                grupo_0[v].push_back(w);

            dfs_1(v, u);
            continue;
        }

        for (auto w1: grupo_0[u])
            for (auto w2: grupo_0[u])
                if (w1 != w2 && connect_0(w1, w2))
                    grau_0[w1]++, grau_0[w2]++;

        int out;
        for (auto w: grupo_0[u])
        {
            if (grau_0[w] == 1 && w != v)
            {
                out = w, bit_0[v] = bit_0[w];
                break;
            }
        }

        for (auto w: grupo_0[u])
            if (w != out)
                grupo_0[v].push_back(w);

        for (auto w1: grupo_0[u])
            for (auto w2: grupo_0[u])
                if (w1 != w2 && connect_0(w1, w2))
                    grau_0[w1]--, grau_0[w2]--;

        dfs_1(v, u);
    }  
}

void Joi(int N, int M, int A[], int B[], long long X, int T)
{
    for (int i = 0; i < M; i++)
    {
        grafo_0[A[i]].push_back(B[i]);
        grafo_0[B[i]].push_back(A[i]);

        adj_0[A[i]].insert(B[i]);
        adj_0[B[i]].insert(A[i]);
    }

    dfs_0_0(0, -1);
    dfs_1(0, -1);

    for (int i = 0; i < N; i++)
    {
        if (X & (1ll<<bit_0[i])) MessageBoard(i, 1);
        else MessageBoard(i, 0);
    }
}

Ioi

#include <bits/stdc++.h>
#include "Ioi.h"

using namespace std;

const int maxn = 2e4+10;

static int grau[maxn], bit[maxn];

static bool on[61];

static vector<int> grafo[maxn], grupo[maxn];

static set<int> adj[maxn];

static bool connect(int u, int v)
{
    return (adj[u].find(v) != adj[u].end());
}

static void dfs_0(int u, int p)
{
    if (grupo[0].size() < 60)
    {
        bit[u] = grupo[0].size();
        grupo[0].push_back(u);
    }

    for (auto v: grafo[u])
        if (v != p)
            dfs_0(v, u);
}

static void dfs(int u, int p)
{
    for (auto v: grafo[u])
    {
        if (v == p) continue;

        bool ok = 0;
        for (auto w: grupo[u])
            if (w == v)
                ok = 1;

        if (ok)
        {
            for (auto w: grupo[u])
                grupo[v].push_back(w);

            dfs(v, u);
            continue;
        }

        for (auto w1: grupo[u])
            for (auto w2: grupo[u])
                if (w1 != w2 && connect(w1, w2))
                    grau[w1]++, grau[w2]++;

        int out;
        for (auto w: grupo[u])
        {
            if (grau[w] == 1 && w != v)
            {
                out = w, bit[v] = bit[w];
                break;
            }
        }

        for (auto w: grupo[u])
            if (w != out)
                grupo[v].push_back(w);

        for (auto w1: grupo[u])
            for (auto w2: grupo[u])
                if (w1 != w2 && connect(w1, w2))
                    grau[w1]--, grau[w2]--;

        dfs(v, u);
    }  
}

void get(int u, int p)
{
    for (auto v: grafo[u])
    {
        if (v == p) continue;

        bool ok = 0;
        for (auto w: grupo[u])
            if (v == w)
                ok = 1;

        if (!ok) continue;

        on[v] = Move(v);
        get(v, u);
        Move(u);
    }
}

long long Ioi(int N, int M, int A[], int B[], int P, int V, int T)
{
    for (int i = 0; i < M; i++)
    {
        grafo[A[i]].push_back(B[i]);
        grafo[B[i]].push_back(A[i]);

        adj[A[i]].insert(B[i]);
        adj[B[i]].insert(A[i]);
    }

    dfs_0(0, -1);
    dfs(0, -1);

    on[bit[P]] = V;
    get(P, -1);

    long long ans = 0;
    for (int i = 0; i < 60; i++)
        if (on[i])
            ans += (1ll<<i);

    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

Joi.cpp: In function 'void dfs_1(int, int)':
Joi.cpp:68:13: warning: 'out' may be used uninitialized in this function [-Wmaybe-uninitialized]
   68 |             if (w != out)
      |             ^~

Ioi.cpp: In function 'void dfs(int, int)':
Ioi.cpp:70:13: warning: 'out' may be used uninitialized in this function [-Wmaybe-uninitialized]
   70 |             if (w != out)
      |             ^~

• Subtask 1: 0 / 8
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