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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7.  
  8. 	int m=n-1;
  9.  
  10. 	vector<vector<int>> adj(n+1);
  11.  
  12. 	while(m--){
  13. 	    int u;
  14. 	    int v;
  15. 	    adj[u].push_back(v);
  16. 	}
  17.  
  18.  
  19. 	vector<int> subtree(n+1,0);
  20.  
  21. 	auto dfs = [&](auto &&dfs, int node, int parent)->void{
  22.  
  23. 	       //subtree[node] = node;
  24.  
  25. 	       for(auto v : adj[node]){
  26. 	           if(v!=parent){
  27. 	                dfs(dfs,v,node);
  28. 	           }
  29. 	       }
  30.  
  31. 	       int s=0;
  32.  
  33. 	       for(auto v: adj[node]){
  34. 	           if(v!=parent){
  35. 	                s += subtree[v];
  36. 	           }
  37. 	       }
  38.  
  39. 	       subtree[node]= s + node ;
  40. 	};
  41.  
  42. 	dfs(dfs,1,-1);
  43.  
  44. 	for(int i=1;i<=n;i++){
  45. 	    cout<<subtree[i]<<" ";
  46. 	}
  47.  
  48. 	cout<<endl;
  49.  
  50.  
  51. }
  52.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
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Subtree sum
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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