Submission #601156

#	Time	Username	Problem	Language	Result	Execution time	Memory
601156		yutabi	Carnival Tickets (IOI20_tickets)	C++14	25 / 100	959 ms	118472 KiB

tickets

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


#define pb push_back


typedef pair <int,int> ii;


long long find_maximum(int k, std::vector<std::vector<int>> X) 
{
	int n = X.size();
	int m = X[0].size();

	vector <pair <int,ii> > x;

	for(int i=0;i<n;i++)
	{
		for(int j=0;j<m;j++)
		{
			x.pb(make_pair(X[i][j],ii(i,j)));
		}
	}

	sort(x.begin(),x.end());


	vector <vector <ii> > small_values(n);
	vector <vector <ii> > big_values(n);

	for(int i=0;i<n*m/2;i++)
	{
		small_values[x[i].second.first].pb(ii(x[i].first,x[i].second.second));
	}

	for(int i=n*m/2;i<n*m;i++)
	{
		big_values[x[i].second.first].pb(ii(x[i].first,x[i].second.second));
	}

	/*for(int i=0;i<n;i++)
	{
		for(int j=0;j<small_values[i].size();j++)
		{
			printf("%d %d  ",small_values[i][j].first,small_values[i][j].second);
		}

		printf("   ");
		
		for(int j=0;j<big_values[i].size();j++)
		{
			printf("%d %d  ",big_values[i][j].first,big_values[i][j].second);
		}

		printf("\n");
	}*/

	vector <vector <int> > answer(n,vector <int> (k,-1));

	long long ans=0;

	for(int i=0;i<k;i++)
	{
		int small=n/2;
		int big=n/2;

		vector <bool> t(n,0);

		for(int j=0;j<n;j++)
		{
			if(small_values[j].size()==0)
			{
				t[j]=1;

				big--;

				ans+=big_values[j].back().first;
				answer[j][big_values[j].back().second]=i;

				big_values[j].pop_back();
			}
			
			else if(big_values[j].size()==0)
			{
				t[j]=1;

				small--;

				ans-=small_values[j].back().first;
				answer[j][small_values[j].back().second]=i;

				small_values[j].pop_back();
			}
		}

		for(int j=0;j<n;j++)
		{
			if(t[j]==0)
			{
				if(big>0)
				{
					t[j]=1;

					big--;

					ans+=big_values[j].back().first;
					answer[j][big_values[j].back().second]=i;

					big_values[j].pop_back();
				}

				else
				{
					t[j]=1;

					small--;

					ans-=small_values[j].back().first;
					answer[j][small_values[j].back().second]=i;

					small_values[j].pop_back();
				}
			}
		}
	}

	allocate_tickets(answer);
	return ans;
}

• 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