Submission #1236998

#TimeUsernameProblemLanguageResultExecution timeMemory
1236998i_love_mritiMonthly railway pass (LMIO18_menesinis_bilietas)C++20
0 / 100
166 ms12156 KiB
#include <bits/stdc++.h>
using namespace std;

const int mxN = 5e5 + 100;

vector<int> adj[mxN];
bool vis[mxN];
int ans = 0;

void dfs(int u){
	if(vis[u]) return;
	vis[u] = 1, ++ans;
	for(auto it : adj[u]) dfs(it);
}

int main(){
	int n, m, u, v;
	cin >> n >> m;
	char ch;
	for(int i = 0; i < m; ++i){
		cin >> u >> v >> ch;
	}
	dfs(1);
	cout << (ans == n ? n : 0) << "\n";
	return 0;
}
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