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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4.  
  5.  
  6.  
  7.  
  8. void dfs(int **adj, int *visited, int v, int node)
  9. {
  10.     //printf("\n%d",v);
  11.     visited[v]=1;
  12.     for(int i=0; i<node; i++)
  13.     {
  14.        if(!visited[i] && adj[v][i]==1)   dfs(adj, visited, i,node);
  15.     }
  16. }
  17.  
  18.  
  19. int main()
  20. {
  21.     int tc, n, m, x, y, k, i, ans;
  22.  
  23.  
  24.     cin>>tc;
  25.     while(tc--)
  26.     {
  27.         ans=0;
  28.         cin>>n>>m;
  29.  
  30.         int **adj=new int*[n];
  31.         int *visited=new int[n];
  32.  
  33.         memset(adj,0,sizeof(adj));
  34.         memset(visited, false, sizeof(visited));
  35.  
  36.         for(i=0;i<m;i++)
  37.         {
  38.             cin>>x>>y;
  39.             adj[x][y]=true;
  40.             adj[y][x]=true;
  41.         }
  42.  
  43.         for(i=0;i<n;i++)
  44.         {
  45.             if(!visited[i])
  46.             {
  47.                 ans++;
  48.                 dfs(adj, visited, i,n);
  49.             }
  50.         }
  51.         cout<<ans<<endl;
  52.     }
  53. }
  54.  
Runtime error #stdin #stdout 0s 16064KB
comments (?)
stdin
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2
4
2
0 1
0 2
8
0
stdout
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Standard output is empty
https://ideone.com/ZD5qBm
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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