Submission #592411

#	Time	Username	Problem	Language	Result	Execution time	Memory
592411		ogibogi2004	Carnival Tickets (IOI20_tickets)	C++14	39 / 100	3106 ms	2097152 KiB

tickets

#include "tickets.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std;
#define ll long long
long long find_maximum(int k, vector<vector<int>> x1) {
    //cout<<"?\n";
    vector<vector<ll> >x;
    for(int i=0;i<x1.size();i++)
    {
        vector<ll>row;
        for(int j=0;j<x1[i].size();j++)row.push_back(x1[i][j]);
        x.push_back(row);
    }
	ll n = x.size();
	ll m = x[0].size();
	vector<vector<int>> answer;
    vector<ll>smallest[n];
    for(ll i=0;i<n;i++)
    {
        smallest[i]=x[i];
        sort(smallest[i].begin(),smallest[i].end());
    }
    ll use[n][m];
    memset(use,-1,sizeof(use));
    ll dp[n][n*k];
    ll hist[n][n*k];
    bool c[n][n*k];
    memset(c,0,sizeof(c));
    ll sum=0;
    for(ll j=0;j<k;j++)sum-=smallest[0][j];
    dp[0][k]=sum;c[0][k]=1;
    hist[0][k]=k;
    for(ll j=k-1;j>=0;j--)
    {
        sum+=smallest[0][j];
        sum+=smallest[0][smallest[0].size()-(k-j)];
        dp[0][j]=sum;c[0][j]=1;
        hist[0][j]=j;
    }
    //cout<<"eho1\n";
    for(ll i=1;i<n;i++)
    {
        sum=0;
        for(ll j=0;j<k;j++)sum-=smallest[i][j];
        for(ll prv=0;prv+k<=n*k/2;prv++)
        {
            if(!c[i-1][prv])continue;
            if(c[i][prv+k]==0)
            {
                dp[i][prv+k]=dp[i-1][prv]+sum;
                c[i][prv+k]=1;
                hist[i][prv+k]=k;
            }
            else
            {
                if(dp[i-1][prv]+sum>dp[i][prv+k])
                {
                    dp[i][prv+k]=dp[i-1][prv]+sum;
                    hist[i][prv+k]=k;
                }
            }
        }
        for(ll j=k-1;j>=0;j--)
        {
            sum+=smallest[i][j];
            sum+=smallest[i][smallest[i].size()-(k-j)];
            for(ll prv=0;prv+j<=n*k/2;prv++)
            {
                if(!c[i-1][prv])continue;
                if(c[i][prv+j]==0)
                {
                    dp[i][prv+j]=dp[i-1][prv]+sum;
                    hist[i][prv+j]=j;
                    c[i][prv+j]=1;
                }
                else
                {
                    if(dp[i-1][prv]+sum>dp[i][prv+j])
                    {
                        dp[i][prv+j]=dp[i-1][prv]+sum;
                        hist[i][prv+j]=j;
                    }
                }
            }
        }
    }
    //cout<<"eho2\n";
    ll t=n*k/2;
    vector<ll>small[n];
    vector<ll>large[n];
    for(ll j=n-1;j>=0;j--)
    {
        //cout<<j<<" "<<t<<endl;
        ll cnts=hist[j][t];
        //cout<<"   "<<cnts<<endl;
        vector<pair<ll,ll> >smallest1;
        for(ll i=0;i<m;i++)
        {
            smallest1.push_back({x[j][i],i});
        }
        sort(smallest1.begin(),smallest1.end());
        for(ll i=0;i<cnts;i++)
        {
            small[j].push_back(smallest1[i].second);
        }

        for(ll i=1;i<=k-cnts;i++)
        {
            large[j].push_back(smallest1[m-i].second);
        }
        t-=cnts;
    }
    //cout<<"eho3\n";
    //cout<<dp[n-1][n*k/2]<<endl;
    for(ll j=0;j<k;j++)
    {
        //cout<<j<<endl;
        vector<pair<ll,ll> >sizes;
        for(ll i=0;i<n;i++)
        {
            sizes.push_back({small[i].size(),i});
        }
        sort(sizes.rbegin(),sizes.rend());
        for(ll i=0;i<sizes.size();i++)
        {
            //cout<< " "<<i<<endl;
            if(i<n/2)
            {
                //cout<<"     "<<small[sizes[i].second].size()<<endl;
                use[sizes[i].second][small[sizes[i].second].back()]=j;
                small[sizes[i].second].pop_back();
            }
            else
            {
                use[sizes[i].second][large[sizes[i].second].back()]=j;
                large[sizes[i].second].pop_back();
            }
        }
    }
    //cout<<"eho4\n";
    for(ll i=0;i<n;i++)
    {
        //cout<<i<<endl;
        vector<int>v;
        for(ll j=0;j<m;j++)
        {
            v.push_back(use[i][j]);
        }
        answer.push_back(v);
    }
    allocate_tickets(answer);
    return dp[n-1][n*k/2];
}
/*
2 3 2
0 2 5
1 1 3
*/

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<x1.size();i++)
      |                 ~^~~~~~~~~~
tickets.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |         for(int j=0;j<x1[i].size();j++)row.push_back(x1[i][j]);
      |                     ~^~~~~~~~~~~~~
tickets.cpp:125:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  125 |         for(ll i=0;i<sizes.size();i++)
      |                    ~^~~~~~~~~~~~~

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