Cod sursa(job #2012182)

Utilizator workwork work work Data 18 august 2017 09:23:25
Problema Parcurgere DFS - componente conexe Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.63 kb
#include <bits/stdc++.h>

using namespace std;

FILE *F=fopen("dfs.in", "r"), *G=fopen("dfs.out", "w");

int K, n, m, x, y;
vector<int> a[100005];
bitset<100005> w;

void dfs(int nod)
{
    w[nod] = 1;
    vector<int> :: iterator it;
    for(it = a[nod].begin(); it != a[nod].end(); ++ it)
        if(!w[*it]) dfs(*it);
}

int main()
{
    fscanf(F, "%d %d", &n, &m);
    for(int i = 1; i <= m; ++ i)
    {
        fscanf(F, "%d %d ", &x, &y);
        a[x].push_back(y);
        a[y].push_back(x);
    }
    for(int i = 1; i <= n; ++ i)
        if(!w[i]) ++K, dfs(i);
    fprintf(G, "%d ", K);
    return 0;
}