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a guest Aug 26th, 2019 77 Never
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  1. #include <vector>
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. // хранение графа ч/з списки смежности
  7.  
  8. int main() {
  9.     int n,m;
  10.     cin >> n >> m;
  11.     vector<vector<int> > v(n);
  12.    
  13.     for (int i = 0; i < m; i++) {
  14.         int s,f;
  15.         cin >> s >> f;
  16.         v[s].push_back(f);
  17.         v[f].push_back(s);
  18.     }
  19.    
  20.     for (int i = 0; i < n; i++){
  21.         for (int j = 0; j < v[i].size(); j++)
  22.             cout << v[i][j] << " ";
  23.         cout << endl;
  24.     }
  25.    
  26.     return 0;
  27. }
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