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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. vector<int>graph[1001];
  4. int visit[1001];
  5. int n, e;
  6. void DFS(int start)
  7. {
  8.     //Initial Step
  9.     visit[start] = 1;
  10.     cout<<start<<" ";
  11.     stack<int>stk;
  12.     stk.push(start);
  13.  
  14.     //Repeating Step
  15.     //int x = stk.top();
  16.     while(!stk.empty())
  17.     {
  18.         int x = stk.top();
  19.         for(int j = 0; j<graph[x].size(); j++)
  20.         {
  21.             int node = graph[x][j];
  22.             if(visit[node] == 0)
  23.             {
  24.                 visit[node] = 1;
  25.                 cout<<node<<" ";
  26.                 stk.push(node);
  27.                 x = stk.top();
  28.                 j = 0;
  29.             }
  30.         }
  31.         stk.pop();
  32.         //x = stk.top();
  33.     }
  34. }
  35.  
  36. int main()
  37. {
  38.     cin>>n>>e;
  39.     int u, v;
  40.     for(int i = 1; i <= e; i++)
  41.     {
  42.         cin>>u>>v;
  43.         graph[u].push_back(v);
  44.         graph[v].push_back(u);
  45.     }
  46.     DFS(1);
  47. }
  48.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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10 13                                                                            1 2                                                                              1 4                                                                              2 3                                                                              4 3                                                                              3 9                                                                              3 10                                                                             2 5                                                                              2 7                                                                              2 8                                                                              5 7                                                                              5 8                                                                              7 8                                                                              5 6
stdout
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1 2 3 4 9 10 5 7 8 6
https://ideone.com/4KPHb5
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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