Submission #1093873

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093873		DobromirAngelov	Library (JOI18_library)	C++14	100 / 100	388 ms	708 KiB

library

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

using namespace std;

const int MAXN=1005;

int n;
vector<int> m;
bool used[MAXN];

int queryNot(int ind)
{
    for(int i=0;i<n;i++)
    {
        m[i]=1;
        if(i==ind-1) m[i]=0;
    }
    return Query(m);
}

int query(vector<int> v)
{
    for(int i=0;i<n;i++) m[i]=0;
    for(auto x: v) m[x-1]=1;
    return Query(m);
}

void Solve(int N)
{
    n=N;
    m.resize(n);

    if(n==1)
    {
        vector<int> res;
        res.push_back(1);
        Answer(res);
        return;
    }

    int st=0;
    for(int i=1;i<=n;i++)
    {
        if(queryNot(i)==1)
        {
            st=i;
            break;
        }
    }

    vector<int> res;
    res.push_back(st);
    used[st]=1;
    vector<int> pot;
    pot.reserve(n);
    for(int i=2;i<=n;i++)
    {
        pot.clear();
        for(int j=1;j<=n;j++)
        {
            if(!used[j]) pot.push_back(j);
        }

        int nxt=0;
        for(int j=0;(1<<j)<=(int)(pot.size()-1);j++)
        {
            vector<int> cur;
            for(int k=0;k<pot.size();k++)
            {
                if(k&(1<<j)) cur.push_back(pot[k]);
            }
            int cnt1=query(cur);
            cur.push_back(res.back());
            int cnt2=query(cur);
            if(cnt1==cnt2) nxt|=(1<<j);
        }
        res.push_back(pot[nxt]);
        used[res.back()]=1;
    }

    Answer(res);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:69:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |             for(int k=0;k<pot.size();k++)
      |                         ~^~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 81 / 81