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Aug 19th, 2018
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  1.  
  2. vector<int> g[MAXN];
  3. int n;
  4.  
  5. int main() {
  6. ัin >> n;
  7. for (int i = 1; i <= n; i++) {
  8. int u, v;
  9. cin >> u >> v;
  10. g[v].pb(u);
  11. g[u].pb(v);
  12. }
  13. return 0;
  14. }
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