fork download 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7. 	vector<int> adjList[n];
  8. 	vector<int> visited(n);
  9. 	vector<int> child(n,-1);
  10. 	queue<int> q;
  11. 	for(int i=0;i<n-1;i++){
  12. 		int x,y;
  13. 		cin>>x>>y;
  14. 		adjList[x].push_back(y);
  15. 		adjList[y].push_back(x);
  16. 	}
  17. 	visited[0]=1;
  18. 	q.push(0);
  19. 	while(!q.empty()){
  20. 		int count=0;
  21. 		int node=q.front();
  22. 		// cout<<node<<" ";
  23. 		q.pop();
  24. 		for(auto adjNode : adjList[node]){
  25. 			if(!visited[adjNode]){
  26. 				q.push(adjNode);
  27. 				visited[adjNode]=1;
  28. 				count++;
  29. 			}
  30. 		}
  31. 		child[node]=count;
  32. 	}
  33. 	for(int i=0;i<child.size();i++){
  34. 		if(child[i]==0)
  35. 			cout<<"child of node "<<i<<" : "<<child[i]<<"\n";
  36. 		else
  37. 			cout<<"node "<<i<<" is a leaf node \n";
  38. 	}
  39. 	return 0;
  40. }
Success #stdin #stdout 0s 5348KB
comments (?)
stdin 
7
0 1
0 2
1 3
1 4
2 5
2 6
stdout 
node 0 is a leaf node 
node 1 is a leaf node 
node 2 is a leaf node 
child of node 3 : 0
child of node 4 : 0
child of node 5 : 0
child of node 6 : 0
https://ideone.com/U72YsI
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!