Pagini recente » Cod sursa (job #2780419) | Cod sursa (job #2182902) | Cod sursa (job #2980623) | Cod sursa (job #2757343) | Cod sursa (job #2782397)
#include<bits/stdc++.h>
using namespace std;
const int inf=(1e9);
class Graph
{
private:
int m_nodes;
vector< vector< pair<int,int> > > m_adjList;
vector<pair<int, pair<int,int> > > m_edges;
bool m_areLabeled;
public:
Graph(int nodes,bool areLabeled)
{
m_nodes=nodes;
m_areLabeled=areLabeled;
m_adjList.resize(nodes+5);
}
void addEdge(int from, int to, int cost)
{
m_adjList[from].push_back(make_pair(to,cost));
m_edges.push_back(make_pair(from,make_pair(to,cost)));
}
vector<int> bfs(int source)
{
queue<int> q;
vector<int> distances(m_nodes+5,-1);
distances[source]=0;
q.push(source);
while(!q.empty())
{
int current = q.front();
q.pop();
for(auto it: m_adjList[current])
{
if(distances[it.first]==-1)
{
distances[it.first]=1+distances[current];
q.push(it.first);
}
}
}
return distances;
}
};
int main()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
int n,m,x,y,source;
scanf("%d%d%d",&n,&m,&source);
Graph G(n,0);
for(int i=0;i<m;i++)
{
scanf("%d%d",&x,&y);
G.addEdge(x,y,0);
}
vector<int> solution=G.bfs(source);
for(int i=1;i<=n;i++)
printf("%d ",solution[i]);
return 0;
}