Submission #648377

#	Time	Username	Problem	Language	Result	Execution time	Memory
648377		berr	The Collection Game (BOI21_swaps)	C++17	35 / 100	102 ms	4556 KiB

swaps

#include <bits/stdc++.h>
#include "swaps.h"
using namespace std;


void solve(int N, int V)
{

    if(V==5000)
    {

        vector<int> vis(N+1);

        vector<int> ans;

        for(int x=0; x<N; x++)
        {
            vector<int> q;
            for(int i=1; i<=N; i++)
            {
                if(!vis[i]) q.push_back(i);
            }

            while(q.size()>1)
            {
                for(int l=0; l<q.size()-1; l+=2)
                {
                    schedule(q[l], q[l+1]);
                }

                auto b=visit();
                vector<int> p;

                for(int l=0; l<b.size(); l++)
                {
                    if(b[l]==1) p.push_back(q[l*2]);
                    else p.push_back(q[l*2+1]);
                }
                if(q.size()%2==1) p.push_back(q[q.size()-1]) ;

                q=p;
            }

            vis[q[0]]=1;
            ans.push_back(q[0]);
        }
        answer(ans);
    }
    else
    {

    vector<array<int, 2>> a[V];
    vector<vector<int>> vis(V, vector<int>(N+1));
 
    vector<vector<int>> c(N+1, vector<int>(N+1));
 
 
 
    for(int i=1; i<=N; i++)
    {
        for(int l=i+1; l<=N; l++)
        {
            int flag=1;
            for(int j=0; j<V&&flag; j++)
            {
                if(vis[j][i]==0&&vis[j][l]==0)
                {
                    a[j].push_back({i, l});
                    vis[j][i]=1;
                    vis[j][l]=1;
                    flag=0;
                }
            }
        }
    }
 
    for(int i=0; i<V&&a[i].size(); i++)
    {
        for(auto l: a[i]) schedule(l[0], l[1]);
        auto b=visit();
 
        for(int l=0; l<a[i].size(); l++)
        {
            if(b[l]==1) c[a[i][l][0]][a[i][l][1]]=1, c[a[i][l][1]][a[i][l][0]]=0;
            else c[a[i][l][0]][a[i][l][1]]=0, c[a[i][l][1]][a[i][l][0]]=1;
        }
    }
 
 
    vector<array<int, 2>> q;
    vector<int> s;
    for(int i=1; i<=N; i++)
    {
        int l=0;
        for(auto j: c[i]) if(j==0) l++;
            q.push_back({l, i});
    }
 
    sort(q.begin(), q.end());
 
    for(auto i: q) s.push_back(i[1]);
 
    answer(s);
    }

}

Compilation message (stderr)

swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:26:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |                 for(int l=0; l<q.size()-1; l+=2)
      |                              ~^~~~~~~~~~~
swaps.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                 for(int l=0; l<b.size(); l++)
      |                              ~^~~~~~~~~
swaps.cpp:82:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |         for(int l=0; l<a[i].size(); l++)
      |                      ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 3 / 3
• Subtask 4: 2 / 2
• Subtask 5: 9 / 9
• Subtask 6: 6 / 6
• Subtask 7: 0 / 9
• Subtask 8: 0 / 6
• Subtask 9: 0 / 21
• Subtask 10: 0 / 14
• Subtask 11: 0 / 9
• Subtask 12: 0 / 6