#include <bits/stdc++.h>
using namespace std;
void dfs(int n, vector<vector<int>>& g, vector<bool>& v) {
v[n] = true;
for (int e : g[n]) {
if (!v[e]) {
dfs(e, g, v);
}
}
}
int c(int N, vector<pair<int, int>>& d) {
vector<vector<int>> g(N);
for (auto d : d) {
g[d.first].push_back(d.second);
g[d.second].push_back(d.first);
}
vector<bool> v(N, false);
int u = 0;
for (int i = 0; i < N; ++i) {
if (!v[i]) {
u++;
dfs(i,g,v);
}
}
return u;
}
int main() {
int N, E;
cin >> N >> E;
vector<pair<int, int>> d(E);
for (int i = 0; i < E; ++i) {
char sodifjsd;
cin >> d[i].first >> d[i].second >> sodifjsd;
}
if (c(N,d) == 1) cout << n;
else cout << 0;
}
Compilation message
menesinis_bilietas.cpp: In function 'int main()':
menesinis_bilietas.cpp:37:30: error: 'n' was not declared in this scope
37 | if (c(N,d) == 1) cout << n;
| ^
