Cod sursa(job #2543757)
Utilizator | Dumitru Stefania dumitrustefania | Data | 11 februarie 2020 14:56:44 |
---|---|---|---|
Problema | Parcurgere DFS - componente conexe | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.6 kb |
#include <bits/stdc++.h>
#include <cstring>
# define pb push_back
using namespace std;
ifstream f("dfs.in");
ofstream g("dfs.out");
int n,m,i,x,y,nr;
bool fr[100001];
vector <int> v[100001];
void dfs(int k)
{
fr[k]=1;
for(int i=0;i<v[k].size();i++)
{
if(fr[v[k][i]]==0)
dfs(v[k][i]);
}
}
int main()
{
f>>n>>m;
for(i=1; i<=m; i++)
{
f>>x>>y;
v[x].pb(y);
v[y].pb(x);
}
for(i=1;i<=n;i++)
{
if(fr[i]==0)
{
dfs(i);
nr++;
}
}
g<<nr;
return 0;
}