Submission #1043080

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043080		MarwenElarbi	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	1 ms	860 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
using namespace std;
#define pb push_back
#define se second
#define fi first
long long find_maximum(int k, std::vector<std::vector<int>> x) {
	long long n = x.size();
	int m = x[0].size();
	vector<vector<int>> ans(n,vector<int> (m,-1));
	priority_queue<pair<pair<int,int>,pair<int,int>>> mx;
	long long res=0;
	for (int i = 0; i < n; ++i)
	{
		for (int j = 0; j < k; ++j)
		{
			ans[i][j]=2;
		}
	}
	for (int i = 0; i < n; ++i)
	{
		for (int j = m-k; j < m; ++j)
		{
			mx.push({{x[i][j],ans[i][j]},{i,j}});
		}
	}
	for (int i = 0; i < k*n/2; ++i)
	{
		auto cur=mx.top();
		res+=cur.fi.fi;
		mx.pop();
		ans[cur.se.fi][cur.se.se]=3;
	}
	priority_queue<pair<pair<int,int>,pair<int,int>>,vector<pair<pair<int,int>,pair<int,int>>>,greater<pair<pair<int,int>,pair<int,int>>>> mn;
	for (int i = 0; i < n; ++i)
	{
		for (int j = 0; j < k; ++j)
		{
			mn.push({{x[i][j],ans[i][j]},{i,j}});
		}
	}
	for (int i = 0; i < k*n/2; ++i)
	{
		auto cur=mn.top();
		mn.pop();
		if(ans[cur.se.fi][cur.se.se]==1) continue;
		res-=cur.fi.fi;
		ans[cur.se.fi][cur.se.se]=0;
	}
	int lst[n];
	memset(lst,0,sizeof lst);
	for (int i = 0; i < n; ++i)
	{
		for (int j = 0; j < m; ++j)
		{
			if(ans[i][j]==2) ans[i][j]=-1;
		}
	}
	for (int i = 0; i < n; ++i)
	{
		for (int j = 0; j < m; ++j)
		{
			if(ans[i][j]==-1) continue;
			ans[i][j]=lst[i]++;
		}
	}
	allocate_tickets(ans);
	return res;
}

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