Cod sursa(job #2277070)
Utilizator | Rosca Rares Raresr14 | Data | 5 noiembrie 2018 19:31:09 |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.62 kb |
#include <fstream>
#define DIM 100100
#include <vector>
using namespace std;
ifstream fin("dfs.in");
ofstream fout("dfs.out");
int c,f[DIM],n,m,x,y;
vector<int> L[DIM];
void dfs(int nod){
f[nod]=c;
for(int i=0;i<L[nod].size();i++){
int vec=L[nod][i];
if(f[vec]==0){
f[vec]=c;
dfs(vec);
}
}
}
int main(){
fin>>n>>m;
for(int i=1;i<=m;i++){
fin>>x>>y;
L[x].push_back(y);
L[y].push_back(x);
}
for(int i=1;i<=n;i++)
if(f[i]==0){
c++;
dfs(i);
}
fout<<c;
return 0;
}