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BFS     WITH    LEBEL



#include<bits/stdc++.h>

using namespace std;

int graph[100][100],v;


void bfs(int src)
{
 int lebel[v+1],i,rem;
 for(i=1;i<=v;i++) lebel[i]=-1;
 lebel[src]=0;

 int visited[v+1];
 for(i=1;i<=v;i++) visited[i]=0;  ///no vertex is visited yet
 visited[src]=1;

 queue<int> q;
 q.push(src);

 while(!q.empty())
 {
  rem=q.front();
  cout<<rem<<" ";
  q.pop();
  for(i=1;i<=v;i++)
  {
   if(graph[rem][i]==1 && visited[i]==0)
   {
    lebel[i]=lebel[rem]+1;
    cout<<i<<" ";
    q.push(i);
    visited[i]=1;
   }
  }
 }
cout<<endl;

for(i=1;i<=v;i++)
cout<<lebel[i]<<" ";
}

int main()
{
int i,j;
cin>>v;

for(i=1;i<=v;i++)
 for(j=1;j<=v;j++)
 cin>>graph[i][j];

 bfs(1);
return 0;
}

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