Submission #397736

#	Time	Username	Problem	Language	Result	Execution time	Memory
397736		leinad2	Carnival Tickets (IOI20_tickets)	C++17	25 / 100	1237 ms	113876 KiB

tickets

#include"tickets.h"
#include<bits/stdc++.h>
using namespace std;
long long find_maximum(int k, vector<vector<int> > x)
{
	int n=x.size();int m=x[0].size();int i, j;
	vector<pair<int, pair<int, int> > >v;
	vector<vector<int> >chk;
	chk.resize(n);
	for(i=0;i<n;i++)chk[i].resize(m);
	vector<int>zero[1510], one[1510];
	for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            v.push_back({x[i][j], {i, j}});
        }
    }
    sort(v.begin(), v.end());
    long long ans=0;
    for(i=0;i<v.size();i++)
    {
        if(2*i<v.size())ans-=v[i].first;
        else ans+=v[i].first,chk[v[i].second.first][v[i].second.second]=1;
    }
    for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            (chk[i][j]==0?zero:one)[i].push_back(j);
        }
    }
    vector<vector<int> >res;
    res.resize(n);
    for(i=0;i<n;i++)
    {
        res[i].resize(m);
        for(j=0;j<m;j++)res[i][j]=-1;
    }
    for(j=0;j<m;j++)
    {
        vector<pair<int, int> >v;
        for(i=0;i<n;i++)v.push_back({one[i].size(), i});
        sort(v.begin(), v.end());
        for(i=0;i<v.size();i++)
        {
            if(2*i<v.size())
            {
                int a=v[i].second;
                int b=zero[a].back();
                zero[a].pop_back();
                res[a][b]=j;
            }
            else
            {
                int a=v[i].second;
                int b=one[a].back();
                one[a].pop_back();
                res[a][b]=j;
            }
        }
    }
    allocate_tickets(res);
    return ans;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(i=0;i<v.size();i++)
      |             ~^~~~~~~~~
tickets.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if(2*i<v.size())ans-=v[i].first;
      |            ~~~^~~~~~~~~
tickets.cpp:45:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for(i=0;i<v.size();i++)
      |                 ~^~~~~~~~~
tickets.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |             if(2*i<v.size())
      |                ~~~^~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 14 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10