SPOJ #442 Searching the Graph

Just CS rookie practice on DFSBFS. But details should be taken care of:

1. Ruby implementation got TLE so I switched to C++

2. There's one space after each output node, including the last one. But SPOJ doesn't clarify it clearly.

// 442

#include <iostream>
#include <vector>
#include <map>
#include <queue>
#include <algorithm>
using namespace std;

typedef map<int, vector<int> > Graph;

void bfs(Graph &g, int key)
{
    vector<int> visited; visited.reserve(g.size());
    for(unsigned ic = 0; ic < g.size(); ic ++)
    {
        visited[ic] = 0;
    }

    queue<int> fifo;
    fifo.push(key);
    while(!fifo.empty())
    {

        int cKey = fifo.front();
        fifo.pop();

        if(visited[cKey - 1] == 0)
        {
            cout << cKey <<" ";

            vector<int> &ajVec = g[cKey];
            for(unsigned i = 0; i < ajVec.size(); i ++)
            {
                fifo.push(ajVec[i]);
            }
            visited[cKey - 1] = 1;
        }
    }

    cout << endl;
}

vector<int> dfs_rec;
void initDfsRec(Graph &g)
{
    dfs_rec.clear();
    unsigned gSize = g.size();
    dfs_rec.reserve(gSize);
    for(unsigned ic = 0; ic < gSize; ic ++)
    {
        dfs_rec[ic] = 0;
    }
}

void dfs(Graph &g, int key)
{
    cout << key << " ";
    dfs_rec[key - 1] = 1;
    vector<int> &ajVec = g[key];
    for(unsigned i = 0; i < ajVec.size(); i ++)
    {
        if(dfs_rec[ajVec[i] - 1] == 0)
        {
            dfs(g, ajVec[i]);
        }
    }
}

int main()
{

    int runcnt = 0;
    cin >> runcnt;
    for(int i = 0; i < runcnt; i ++)
    {
        Graph g;

        int nvert = 0; cin >> nvert;
        for(int n = 0; n < nvert; n ++)
        {
            int vid = 0; cin >> vid;
            int cnt = 0; cin >> cnt;
            vector<int> ajVec;
            for(int k = 0; k < cnt; k ++)
            {
                int aj = 0; cin >> aj;
                ajVec.push_back(aj);
            }

            g.insert(Graph::value_type(vid, ajVec));
        }


        //
        cout << "graph " << i +1 << endl;

        int ikey = 0, iMode = 0;
        cin >> ikey >> iMode;
        while(!(ikey == 0 && iMode == 0))
        {
            if(iMode == 0)
            {
                initDfsRec(g);
                dfs(g, ikey);
                cout <<endl;
            }
            else if(iMode == 1)
            {
                bfs(g, ikey);
            }
            cin >> ikey >>iMode;
        }
    }

    return 0;
}