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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int graph[1001][1001];
  4. int visit[1001];
  5. int n, e;
  6.  
  7. void DFS(int start)
  8. {
  9.     //Using Stack
  10.     //Initial Steps
  11.     visit[start] = 1;
  12.     stack<int>STK;
  13.     STK.push(start);
  14.     cout<<start<<" ";
  15.  
  16.     //Repeating step
  17.  
  18.     while(!STK.empty())
  19.     {
  20.         for(int j = 1; j <= n; j++)
  21.         {
  22.             int x = STK.top();
  23.             if(visit[j] == 0 && graph[x][j] != 0)
  24.             {
  25.                 visit[j] = 1;
  26.                 STK.push(j);
  27.                 cout<<j<<" ";
  28.                 j = 1;
  29.             }
  30.         }
  31.         STK.pop();
  32.     }
  33. }
  34.  
  35.  
  36. void DFS_RC(int start)
  37. {
  38.     visit[start] = 1;
  39.     cout<<start<<" ";
  40.  
  41.     for(int j = 1; j <= n; j++)
  42.     {
  43.         if(visit[j] == 0 && graph[start][j] != 0)
  44.         {
  45.             visit[j] = 1;
  46.             DFS_RC(j);
  47.         }
  48.     }
  49. }
  50.  
  51.  
  52.  
  53. int main()
  54. {
  55.     cin>>n>>e;
  56.     int u, v;
  57.     for(int i = 1; i <= e; i++)
  58.     {
  59.         cin>>u>>v;
  60.         graph[u][v] = 1;
  61.         graph[v][u] = 1;
  62.     }
  63.     //DFS(1);
  64.     DFS_RC(1);
  65.  
  66.  
  67. }
  68.  
Success #stdin #stdout 0.01s 5252KB
comments (?)
stdin 
10 13
1 2
2 3
3 4
3 10
3 9
2 5
2 7
2 8
5 6
5 7
5 8
7 8
4 1
stdout 
1 2 3 4 9 10 5 6 7 8
https://ideone.com/roMvbx
language:
C++ (gcc 8.3)
created:
23 hours ago
visibility:
public

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