oj.uz

Submission #208723

# Submission time Handle Problem Language Result Execution time Memory
208723 2020-03-12T05:35:07 Z Fischer Planinarenje (COCI18_planinarenje) C++14
160 / 160
 340 ms 764 KB 
#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

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
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 376 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 376 KB Output is correct
2 Correct 7 ms 376 KB Output is correct
3 Correct 9 ms 376 KB Output is correct
4 Correct 8 ms 376 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 313 ms 712 KB Output is correct
2 Correct 321 ms 748 KB Output is correct
3 Correct 268 ms 764 KB Output is correct
4 Correct 340 ms 760 KB Output is correct

Subtask #6
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 376 KB Output is correct
2 Correct 11 ms 376 KB Output is correct
3 Correct 10 ms 376 KB Output is correct

Subtask #7
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 376 KB Output is correct
2 Correct 26 ms 440 KB Output is correct
3 Correct 10 ms 376 KB Output is correct
4 Correct 10 ms 376 KB Output is correct

Subtask #8
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 508 KB Output is correct
2 Correct 152 ms 760 KB Output is correct
3 Correct 69 ms 504 KB Output is correct

Subtask #9
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 504 KB Output is correct
2 Correct 112 ms 628 KB Output is correct
3 Correct 71 ms 508 KB Output is correct
4 Correct 12 ms 504 KB Output is correct

Subtask #10
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 632 KB Output is correct
2 Correct 82 ms 504 KB Output is correct
3 Correct 95 ms 632 KB Output is correct
4 Correct 26 ms 504 KB Output is correct