Cod sursa(job #997953)
Utilizator | Data | 15 septembrie 2013 12:28:43 | |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 65 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.52 kb |
#include<fstream>
#include<vector>
#define dim 100007
using namespace std;
ifstream f("dfs.in");
ofstream g("dfs.out");
vector< int >G[dim];
int n,m,x,y,i,nr;
int viz[dim];
void dfs(int nod) {
viz[nod]=1;
for(int i=0;i<G[nod].size();++i){
if(!viz[G[nod][i]])
dfs(G[nod][i]);
}
}
int main () {
f>>n>>m;
for(i=1;i<=n;++i){
f>>x>>y;
G[x].push_back(y);
G[y].push_back(x);
}
for(i=1;i<=n;++i){
if(!viz[i]){
dfs(i);
++nr;
}
}
g<<nr<<"\n";
return 0;
}