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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int graph[1001][1001];
  4. int visit[1001];
  5. int node, edge;
  6.  
  7. void BFS(int start)
  8. {
  9.     //Initial step
  10.     visit[start] = 1;
  11.     cout<<start<<" ";
  12.     queue<int>Q;
  13.     Q.push(start);
  14.  
  15.     //Repeating Step
  16.     while(!Q.empty())
  17.     {
  18.         int x = Q.front();
  19.         Q.pop();
  20.         for(int j = 1; j <= node; j++)
  21.         {
  22.             if(visit[j] == 0 && graph[x][j] != 0)
  23.             {
  24.                 visit[j] = 1;
  25.                 cout<<j<<" ";
  26.                 Q.push(j);
  27.             }
  28.         }
  29.  
  30.  
  31.     }
  32.  
  33.  
  34. }
  35.  
  36. int main()
  37. {
  38.     cin>>node>>edge;
  39.     int u, v;
  40.     for(int i = 1; i <= edge; i++)
  41.     {
  42.         cin>>u>>v;
  43.         graph[u][v] = 1;
  44.         graph[v][u] = 1;
  45.     }
  46.  
  47.     BFS(1);
  48.  
  49. }
  50.  
Success #stdin #stdout 0s 5332KB
comments (?)
stdin 
10 13
1 2
1 4
4 3
2 3
3 9
3 10
2 5
2 7
2 8
5 6
5 7
5 8
7 8
stdout 
1 2 4 3 5 7 8 9 10 6
https://ideone.com/HTRY7s
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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