Cod sursa(job #2377896)
Utilizator | Catalin Breaz FMI catalin.brz98 | Data | 11 martie 2019 13:38:43 |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.64 kb |
#include<iostream>
#include<fstream>
#include<vector>
using namespace std;
vector<int> v[100001];
int n,m,viz[100001];
void DFS(int x)
{
viz[x]=1;
int i;
for(i=0;i<v[x].size();i++)
if(viz[v[x][i]]==0)
DFS(v[x][i]);
}
int main()
{
ifstream f("dfs.in");
ofstream g("dfs.out");
f>>n>>m;
int x,y,i,S=0;
for(i=0;i<m;i++)
{
f>>x>>y;
v[x].push_back(y);
v[y].push_back(x);
}
for(i=1;i<=n;i++)
viz[i]=0;
for(i=1;i<=n;i++)
if(viz[i]==0)
{
S++;
DFS(i);
}
g<<S;
return 0;
}