Submission #212163

#	Time	Username	Problem	Language	Result	Execution time	Memory
212163		M0REDA	Chameleon's Love (JOI20_chameleon)	C++14	0 / 100	5 ms	384 KiB

chameleon

#include <bits/stdc++.h>
#include "chameleon.h"
#define debug(x) cerr << #x << " = " << x << ", ";
#define ll long long
#define pb push_back
using namespace std;
#define FAST_IO                       \
    ios_base::sync_with_stdio(false); \
    cin.tie(NULL);                    \
    cout.tie(NULL);
void Solve(int N)
{
    vector<vector<int>> v(2 * N + 1);
    vector<int> graph(2 * N + 1, -1);
    for (int i = 1; i <= 2 * N; i++)
    {
        for (int j = i + 1; j <= 2 * N && v[i].size() < 3; j++)
        {
            vector<int> p;
            p.pb(i);
            p.pb(j);
            int z = Query(p);
            debug(i);
            debug(j);
            debug(z);
            cerr << endl;
            cerr << "======================" << endl;
            if (z == 1)
            {
                v[i].pb(j);
                v[j].pb(i);
            }
        }
    }
    for (auto a : v)
    {
        for (auto b : a)
        {
            cerr << b << " ";
        }
        cerr << endl;
    }
    for (int i = 1; i <= 2 * N; i++)
    {
        // if (v[i].size() == 1)
        // {
        //     graph[i] = v[i][0];
        //     continue;
        // }
        for (int j = 0; j < v[i].size() && graph[i] == -1; j++)
        {
            for (int k = j + 1; k < v[i].size(); k++)
            {
                vector<int> p;
                p.pb(i);
                p.pb(v[i][j]);
                p.pb(v[i][k]);
                if (Query(p) == 1)
                {
                    graph[i] = v[i][3 - j - k];
                    break;
                }
            }
        }
    }
    for (int i = 1; i <= 2 * N; i++)
    {
        if (v[i].size() == 1)
        {
            // debug(i);
            // debug(graph[i]);
            // cerr << endl;
            // cerr << "======================" << endl;
            if (i < graph[i])
                Answer(i, graph[i]);
            continue;
        }
        if (v[i].size() == 2)
        {
            assert(false);
        }
        for (int j = 0; j < 3; j++)
        {
            if (v[i][j] == graph[i] || i == graph[v[i][j]])
            {
                continue;
            }
            if (i < v[i][j])
                Answer(i, v[i][j]);
            break;
        }
    }
}

Compilation message (stderr)

chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:50:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < v[i].size() && graph[i] == -1; j++)
                         ~~^~~~~~~~~~~~~
chameleon.cpp:52:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int k = j + 1; k < v[i].size(); k++)
                                 ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36