Submission #240274

#	Time	Username	Problem	Language	Result	Execution time	Memory
240274		MrRobot_28	Planinarenje (COCI18_planinarenje)	C++17	160 / 160	219 ms	1148 KiB

planinarenje

#include<bits/stdc++.h>
using namespace std;
vector <vector <int> > g;
vector <int> used, mat, mat1;
bool dfs(int v, int cnt)
{
	if(used[v] == cnt)
	{
		return false;
	}
	used[v] = cnt;
	for(int i = 0; i < g[v].size(); i++){
		int to = g[v][i];
		if(mat[to] == -1 || dfs(mat[to], cnt))
		{
			mat[to] = v;
			return true;
		}
	}
	return false;
}
bool dfs1(int v, int cnt)
{
	if(used[v] == cnt)
	{
		return false;
	}
	used[v] = cnt;
	for(int i = 0; i < g[v].size(); i++){
		int to = g[v][i];
		if(used[to] == cnt)
		{
			continue;
		}
		if(mat1[to] == -1 || dfs1(mat1[to], cnt))
		{
			mat1[to] = v;
			return true;
		}
	}
	return false;
}
signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n, m;
	cin >> n >> m;
	g.resize(2 * n);
	mat1.resize(2 * n ,-1);
	mat.resize(2 * n, -1);
	used.resize(2 * n);
	for(int i = 0; i < m; i++)
	{
		int a, b;
		cin >> a >> b;
		a--;
		b--;
		b += n;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	for(int i = 0;i < n; i++)
	{
		dfs(i, i + 1);	
	}
	int cnt1 = 0;
	for(int i = n; i < n * 2; i++)
	{
		if(mat[i] != -1)
		{
			cnt1++;
		}
	}
	vector <bool> ans(n);	
	for(int i = 0; i < n; i++)
	{
		int st = -1;
		for(int j = 0; j < 2 * n; j++){
			mat1[j] = -1;
		}
		for(int j = 0; j < 2 * n; j++)
		{
			if(mat[j] != -1 && mat[j] != i)
			{
				mat1[mat[j]] = j;
			}
			if(mat[j] == i)
			{
				st = j;
			}
		}
		used[i] = n + i + 1;
		if(st != -1)
		{
			dfs1(st, n + i + 1);
		}
		int cnt2 = 0;
		for(int j = 0; j < n; j++)
		{
			if(mat1[j] != -1)
			{
				cnt2++;
			}
		}
		if(cnt1 == cnt2)
		{
			ans[i] = true;
		}
		else
		{
			ans[i] = false;
		}
	}
	for(int i = 0; i < n; i++)
	{
		if(ans[i])
		{
			cout << "Mirko\n";
		}
		else
		{
			cout << "Slavko\n";
		}
	}
    return 0;
}

Compilation message (stderr)

planinarenje.cpp: In function 'bool dfs(int, int)':
planinarenje.cpp:12:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < g[v].size(); i++){
                 ~~^~~~~~~~~~~~~
planinarenje.cpp: In function 'bool dfs1(int, int)':
planinarenje.cpp:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < g[v].size(); i++){
                 ~~^~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 16 / 16
• Subtask 3: 16 / 16
• Subtask 4: 16 / 16
• Subtask 5: 16 / 16
• Subtask 6: 16 / 16
• Subtask 7: 16 / 16
• Subtask 8: 16 / 16
• Subtask 9: 16 / 16
• Subtask 10: 16 / 16