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  1. #include <iostream>
  2. #include <fstream>
  3.  
  4. using namespace std;
  5.  
  6. int n,x,y,a[101][101],i,j,v[50],k;
  7.  
  8. void citire()
  9. {
  10.     ifstream f("listavecini.in");
  11.     f>>n;
  12.     while(f>>x>>y)
  13.     {
  14.         a[x][y]=a[y][x]=1;
  15.     }
  16.     f.close();
  17. }
  18.  
  19. void afisliste()
  20. {
  21.     ofstream g("listavecini.out");
  22.     for(i=1;i<=n;i++)
  23.     {
  24.         k=0;
  25.         for(j=1;j<=n;j++)
  26.         {
  27.             if(a[i][j]==1)
  28.             {
  29.                 k++;
  30.                 v[k]=j;
  31.             }
  32.         }
  33.         g<<k<<" ";
  34.         for(int f=1;f<=k;f++)
  35.             for(int g=1;g<=k;g++)
  36.                 if(v[f]<v[g]) swap(v[f],v[g]);
  37.         for(int f=1;f<=k;f++)
  38.         {
  39.             g<<v[f]<<" ";
  40.         }
  41.         g<<endl;
  42.     }
  43.     g.close();
  44. }
  45.  
  46. int main()
  47. {
  48.     citire();
  49.  
  50.     afisliste();
  51.     return 0;
  52. }
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