oj.uz

Submission #858206

# Submission time Handle Problem Language Result Execution time Memory
858206 2023-10-07T15:06:59 Z serifefedartar Magenta (COCI21_magenta) C++17
110 / 110
 44 ms 8540 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define fast ios::sync_with_stdio(0);cin.tie(0);
#define s second
#define f first
typedef long long ll;
const ll MOD = 1e9 + 7;
const ll LOGN = 18; 
const ll INF = 1e15;
const ll MAXN = 1e5 + 5;

int a, b;
vector<vector<pair<int,int>>> graph;
int d[MAXN];
int get_dist(int node, int parent, int dist) {
	if (node == b)
		return dist;
	for (auto u : graph[node]) {
		if (u.f == parent)
			continue;
		int q = get_dist(u.f, node, dist + 1);
		if (q != -1) 
			return q;
	}
	return -1;
}

void dfs(int node, int parent, int dist) {
	d[node] = dist;
	for (auto u : graph[node]) {
		if (u.f == parent || u.s == 2)
			continue;
		dfs(u.f, node, dist + 1);
	}
}


bool swapped = false, control = false;
void dfs2(int node, int parent, int dist, int q) {
	if (q == 2) {
		control = true;
		return ;
	}

	for (auto u : graph[node]) {
		if (u.s == 1 || u.f == parent)
			continue;

		if (d[u.f] == -1)
			dfs2(u.f, node, dist + 1, q + 1);
		else if (d[u.f] > dist + 1 - swapped)
			dfs2(u.f, node, dist + 1, 0);
	}
}

int main() {
	fast
	memset(d, -1, sizeof(d));
	int n;
	cin >> n;

	cin >> a >> b;
	graph = vector<vector<pair<int,int>>>(n+1, vector<pair<int,int>>());
	for (int i = 1; i < n; i++) {
		int u, v;
		string type;
		cin >> u >> v >> type;
		int t;
		if (type == "magenta")
			t = 0;
		else if (type == "plava")
			t = 1;
		else
			t = 2;
		graph[u].push_back({v, t});
		graph[v].push_back({u, t});
	}

	bool check_a = false, check_b = false;
	for (auto u : graph[a]) {
		if (u.s != 2 && u.f != b)
			check_a = true;
	}
	for (auto u : graph[b]) {
		if (u.s != 1)
			check_b = true;
	}

	if (!check_a) {
		cout << "Marin\n";
		return 0;
	}
	if (!check_b) {
		cout << "Paula\n";
		return 0;
	}


	int Q = get_dist(a, a, 0);

	if (Q % 2) {
		for (int i = 1; i <= n; i++) {
			for (int j = 0; j < graph[i].size(); j++) {
				if (graph[i][j].s != 0)
					graph[i][j].s = 3 - graph[i][j].s;
			}
		}
		swapped = true;
		swap(a, b);
	}
	dfs(a, a, 0);
	dfs2(b, b, 0, 0);

	if (control)
		cout << "Magenta\n";
	else {
		if (swapped)
			cout << "Marin\n";
		else
			cout << "Paula\n";		
	}
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:104:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |    for (int j = 0; j < graph[i].size(); j++) {
      |                    ~~^~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 0 ms 600 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 0 ms 604 KB Output is correct
13 Correct 0 ms 860 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 6748 KB Output is correct
2 Correct 40 ms 6848 KB Output is correct
3 Correct 35 ms 6736 KB Output is correct
4 Correct 44 ms 6980 KB Output is correct
5 Correct 32 ms 6736 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 0 ms 600 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 0 ms 604 KB Output is correct
13 Correct 0 ms 860 KB Output is correct
14 Correct 34 ms 6748 KB Output is correct
15 Correct 40 ms 6848 KB Output is correct
16 Correct 35 ms 6736 KB Output is correct
17 Correct 44 ms 6980 KB Output is correct
18 Correct 32 ms 6736 KB Output is correct
19 Correct 1 ms 860 KB Output is correct
20 Correct 0 ms 604 KB Output is correct
21 Correct 0 ms 604 KB Output is correct
22 Correct 0 ms 604 KB Output is correct
23 Correct 0 ms 852 KB Output is correct
24 Correct 0 ms 600 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 0 ms 848 KB Output is correct
27 Correct 0 ms 604 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 692 KB Output is correct
30 Correct 0 ms 604 KB Output is correct
31 Correct 31 ms 8536 KB Output is correct
32 Correct 31 ms 8528 KB Output is correct
33 Correct 39 ms 8540 KB Output is correct
34 Correct 33 ms 8536 KB Output is correct