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  1. Practice
  2. Data Structures
  3. Trees
  4. Tree : Top View
  5. Discussions

Tree : Top View

  • Scipsycho + 0 comments

    yeah but technically in your second example it should be 8-4-2-1-3. I am scratching my head for a very long time , they should really add more explanation

    void topView(node * root,int fact=0,int lcomp=1,int rcomp=-1) {
    
    if(root==nullptr)
        return;
    
    cerr<<root->data<<": "<<lcomp<<" ' "<<fact<<" ' "<<rcomp<<endl;
    if((fact>rcomp) || (fact<lcomp)){
        cout<<root->data<<" ";
        if(lcomp>rcomp){
            rcomp++;
            lcomp--;
        }
        else if(fact>rcomp)
            rcomp++;
        else if(fact<lcomp)
            lcomp--;
        
        
        
    }
    topView(root->left,fact-1,lcomp,rcomp);
    topView(root->right,fact+1,lcomp,rcomp);
}