Submission #302209

#	Time	Username	Problem	Language	Result	Execution time	Memory
302209		arthurconmy	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	288 KiB

tickets

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

using ll = long long;

#define len(x) int((x).size())
#define ff first
#define ss second

#ifdef ARTHUR_LOCAL
	void allocate_tickets(vector<vector<int>> ans)
	{
		for(auto a:ans)
		{
			for(auto b:a) cout << b << " ";
			cout << endl;

		}
	}
#endif

ll find_maximum(int k, vector<vector<int>> X) 
{
	int n = len(X);
	int m = len(X[0]);
	vector<vector<int>> answer;

	for (int i = 0; i < n; i++) 
	{
		vector<int> row(m);
		for(int j = 0; j < m; j++) 
		{
			row[j] = -1;
		}
		answer.push_back(row);
	}

	vector<pair<vector<int>,vector<int>>> V;

	int no_zeroes = 0;

	for(int i=0; i<n; i++)
	{
		for(int j=0; j<m; j++)
		{
			if(X[i][j] == 0) no_zeroes++;
		}
	}

	int dom=-1;
	if(no_zeroes + no_zeroes >= n*m) dom = 0;
	else dom=1;

	for(int i=0; i<n; i++)
	{
		pair<vector<int>,vector<int>> P = {{},{}};

		for(int j=0; j<m; j++)
		{
			if(X[i][j] == dom) P.ss.push_back(j);
			else P.ff.push_back(j);
		}

		V.push_back(P);
	}

	ll cur_ans = 0LL;

	for(int round=0; round<k; round++)
	{
		int doms=0;
		int nondoms=0;

		for(int i=0; i<n; i++)
		{
			if(V[i].ss.empty())
			{
				nondoms++;
				//cout << i << " " << V[i].ff.back() << " 1" << endl;
				answer[i][V[i].ff.back()]=round;
				V[i].ff.pop_back();
				continue;
			}

			if(V[i].ff.empty())
			{
				doms++;
				//cout << i << " " << V[i].ss.back() << " 2" << endl;
				answer[i][V[i].ss.back()]=round;
				V[i].ss.pop_back();
				continue;
			}
		}

		for(int i=0; i<n; i++)
		{
			if(V[i].ff.empty() || V[i].ss.empty()) continue;

			if(nondoms < int(n/2))
			{
				nondoms++;
				//cout << i << " " << V[i].ff.back() << " 3" << endl;
				answer[i][V[i].ff.back()]=round;
				V[i].ff.pop_back();
				continue;
			}

			else
			{
				doms++;
				//cout << i << " " << V[i].ss.back() << " 4" << endl;
				answer[i][V[i].ss.back()]=round;
				V[i].ss.pop_back();
				continue;
			}
		}

		cur_ans += min(doms,nondoms);
	}

	//cout << "The answer is " << cur_ans << endl;

	allocate_tickets(answer);
	return cur_ans; // min(no_zeroes, n*m-no_zeroes);
}

#ifdef ARTHUR_LOCAL
int main()
{
	find_maximum(2, {{1,1},{1,1}});
}
#endif

• Subtask 1: 0 / 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