Pagini recente » Cod sursa (job #302982) | Cod sursa (job #1186760) | Cod sursa (job #1541365) | Cod sursa (job #1411663) | Cod sursa (job #1117681)
#include <fstream>
#include <vector>
#include <bitset>
#define pb push_back
using namespace std;
ifstream f("dfs.in");
ofstream g("dfs.out");
int n, m, x, y, sol=0;
bitset < 100005 > viz;
vector < int > G[100005];
inline void dfs(int nod)
{
viz[nod]=1; vector <int>::iterator it=G[nod].begin();
for (; it!=G[nod].end(); ++it)
if (!viz[*it]) dfs(*it);
}
int main()
{
f>>n>>m;
for (int i=1; i<=m; ++i)
f>>x>>y, G[x].pb(y), G[y].pb(x);
for (int i=1; i<=n; ++i)
if (!viz[i])
dfs(i), ++sol;
g<<sol<<'\n';
return 0;
}