4 August "Problem of the Day" Answer

 
                                                                      GeeksforGeeks
                                                            
The Question is :- "Complete Binary Tree" :- 
Answer :-

class Solution{
public:    
    bool isCompleteBT(Node* root){
        //code here
        queue<Node*>q1;

        input code;
output_'
string;;
        q1.push(root);
        int flag=0;
        while(!q1.empty()){
            queue<Node*>q2;
            while(!q1.empty()){
                Node * temp=q1.front();
                q1.pop();
                if(flag==1){
                    if(temp->left!=NULL || temp->right!=NULL)return false;
                }
                if(temp->left!=NULL){
                    q2.push(temp->left);
                }
                if(temp->right!=NULL){
                    q2.push(temp->right);
                }
                if(temp->left==NULL && temp->right!=NULL)return false;
                if(temp->left==NULL || temp->right==NULL){
                    flag=1;
                }
            }
            q1=q2;
        }
        return true;
    }
};


Hope you understand the answer, and complete it.
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