Cod sursa(job #1138771)

Utilizator UAIC_Balan_Negrus_HreapcaUAIC Balan Negrus Hreapca UAIC_Balan_Negrus_Hreapca Data 10 martie 2014 16:12:52
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.79 kb
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <fstream>
#include <iterator>
#include <random>
#include <assert.h>
using namespace std;

const string file = "bfs";

const string infile = file + ".in";
const string outfile = file + ".out";

const int INF = 0x3f3f3f3f; 

//#define ONLINE_JUDGE

int main()
{
#ifdef ONLINE_JUDGE
	ostream &fout = cout;
	istream &fin = cin;
#else
	fstream fin(infile.c_str(), ios::in);
	fstream fout(outfile.c_str(), ios::out);
#endif	

    int N, M, S;
    fin >> N >> M >> S;
    vector<vector<int> > G(N + 1);
    for(int i = 0; i < M; i++)
    {
        int x, y;
        fin >> x >> y;
        G[x].push_back(y);
    }

    vector<int> dist(N + 1, -1);
    vector<bool> viz(N + 1, false);

    queue<int> que;
    que.push(S);
    dist[S] = 0;
    viz[S] = true;
    while(que.empty() == false)
    {
        int x = que.front();
        que.pop();
        for(vector<int>::iterator itr = G[x].begin();
                itr != G[x].end();
                itr++)
        {
            if(viz[*itr] == false)
            {
                dist[*itr] = dist[x] + 1;
                que.push(*itr);
            }

        }
    }

    for(int i = 1; i <= N; i++)
    {
        fout << dist[i] << " ";
    }
    fout << "\n";
#ifdef ONLINE_JUDGE
#else
    fout.close();
	fin.close();
#endif
}