Submission #964929

#	Time	Username	Problem	Language	Result	Execution time	Memory
964929		MinaRagy06	Newspapers (CEOI21_newspapers)	C++17	0 / 100	1 ms	344 KiB

newspapers

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

const int N = 1005;
vector<int> adj[N];
int col[N];
bool dfs(int i, int c) {
	if (~col[i]) {
		return col[i] == c;
	}
	col[i] = c;
	bool ok = 1;
	for (auto nxt : adj[i]) {
		ok &= dfs(nxt, c ^ 1);
	}
	return ok;
}
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	memset(col, -1, sizeof col);
	int n, m;
	cin >> n >> m;
	for (int i = 0, u, v; i < m; i++) {
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	cout << (dfs(1, 0)? "YES\n" : "NO\n");
	return 0;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 8
• Subtask 3: 0 / 80