Submission #208723

#	Time	Username	Problem	Language	Result	Execution time	Memory
208723		Fischer	Planinarenje (COCI18_planinarenje)	C++14	160 / 160	340 ms	764 KiB

planinarenje

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

struct BipartiteMatcher {
	vector<vector<int>> g;
	vector<int> L, R;
	vector<bool> vis;
	BipartiteMatcher(int n, int m):
		g(n), L(n, -1), 
		R(m, -1), vis(n) {} 

	void addEdge(int a, int b) {
		g[a].push_back(b);
	}	

	bool match(int x) {
		if (vis[x]) return 0;
		vis[x] = 1;
		for (int v : g[x])
			if (R[v] == -1) 
				return R[L[x] = v] = x, 1;
		for (int v : g[x])
			if (match(R[v]))
				return R[L[x] = v] = x, 1;
		return 0;
	}

	vector<int> solve() {
		int cnt = 1;
		while (cnt--) {
			fill(vis.begin(), vis.end(), 0);
			for (int i = 0; i < L.size(); ++i)
				cnt |= L[i] == -1 and match(i);
		}
		vector<int> res(L.size());
		for (int i = 0; i < L.size(); ++i) {
			if (L[i] == -1) res[i] = 1;
			else {
				fill(vis.begin(), vis.end(), 0);
				vis[i] = 1;	
				int v= L[i];	
				R[v] = -1; L[i] = -1;
				cnt = 0;
				for (int i = 0; i < L.size(); ++i) {
					cnt |= L[i] == -1 and match(i);
				}
				if (cnt) {
					res[i] = 1;
				} else {
					res[i] = 0;
					R[L[i] = v] = i; 
				}
			}
		}
		return res;
	}
};

int main() {
	int n, m;	
	cin >> n >> m;
	BipartiteMatcher BM(n, n);
	for (int i = 1; i <= m; ++i) {
		int a, b;
		cin >> a >> b;
		BM.addEdge(a - 1, b - 1);
	}
	vector<int> res = BM.solve();
	for (int v : res) {
		cout << (v ? "Mirko" : "Slavko") << endl;
	}
	return 0;
}

Compilation message (stderr)

planinarenje.cpp: In member function 'std::vector<int> BipartiteMatcher::solve()':
planinarenje.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int i = 0; i < L.size(); ++i)
                    ~~^~~~~~~~~~
planinarenje.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < L.size(); ++i) {
                   ~~^~~~~~~~~~
planinarenje.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < L.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