Submission #1291917

#	Time	Username	Problem	Language	Result	Execution time	Memory
1291917		serkanrashid	Chameleon's Love (JOI20_chameleon)	C++17	40 / 100	42 ms	468 KiB

chameleon

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


using namespace std;

//int Query(const std::vector<int> &p)
//void Answer(int a, int b)

const int MAXN = 1024;

int n;
vector<int>g[MAXN];
bool vis[MAXN];


/*
4
0 0 0 0 1 1 1 1
1 2 3 4 1 2 3 4
6 7 8 5 2 3 4 1
*/



int in[MAXN],ou[MAXN];
vector<int>p;

vector<int> subred(int l, int r)
{
    vector<int>res;
    for(int i = l; i <= r; i++) res.push_back(i);
    return res;
}

int bin_s(int i, pair<int,int> bef)
{
    int l = n+1;
    int r = 2*n;
    int mid;

    while(l <= r)
    {
        mid = (l+r)/2;
        p.clear();
        for(int j = n+1; j <= 2*n; j++) if(j != bef.first && j != bef.second) p.push_back(j);
        p.push_back(i);
        if(Query(p) <= p.size()-1) r = mid-1;
        else l = mid+1;
    }
    return l;
}

void SOLVE4(int i)
{
    p = subred(n+1,2*n);
    p.push_back(i);

    int gr = 3;
    if(Query(p) == p.size() - 1) gr = 1;

    pair<int,int>bef = {-1,-1};
    for(int j = 0; j < gr; j++)
    {
        int pos = bin_s(i,bef);

        g[i].push_back(pos);
        g[pos].push_back(i);

        bef.second = bef.first;
        bef.first = pos;
    }
}

void Solve(int N)
{
    n = N;

    if(n <= 50)
    {
        for(int i = 1; i <= 2*n; i++)
        {
            for(int j = i+1; j <= 2*n; j++)
            {


                if(Query({i,j}) == 1)
                {
                    g[i].push_back(j);
                    g[j].push_back(i);
                }
            }
        }
    }
    else
    {
        for(int i = 1; i <= n; i++) SOLVE4(i);
    }

    for(int i = 1; i <= 2*n; i++)
    {
        if(g[i].size() == 1)
        {
            if(!vis[i] && !vis[g[i][0]]) Answer(i,g[i][0]);
            vis[i] = 1;
            vis[g[i][0]] = 1;
            continue;
        }

        int ab = Query({i,g[i][0],g[i][1]});
        int ac = Query({i,g[i][0],g[i][2]});
        int bc = Query({i,g[i][1],g[i][2]});

        if(ab == ac) in[g[i][0]] = i;
        if(ab == bc) in[g[i][1]] = i;
        if(bc == ac) in[g[i][2]] = i;
    }
    for(int i = 1; i <= 2*n; i++) ou[in[i]] = i;

    for(int i = 1; i <= 2*n; i++)
    {
        if(vis[i]) continue;

        for(int j = 0; j < 3; j++)
        {
            if(j > g[i].size()-1) break;

            if(g[i][j] != in[i] && g[i][j] != ou[i])
            {
                if(!vis[i] && !vis[g[i][j]]) Answer(i,g[i][j]);
                vis[i] = 1;
                vis[g[i][j]] = 1;
                break;
            }
        }
    }
}

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