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//AVL TREE
//MAX  PRODUCT SUBSEQ OF SIZE 3 IN INCREASING ORDER
#include<iostream>

using namespace std;

struct Node
{

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//Quick sort on Link Lists

//Doubly LinkList

//Note:- tricky check while swap

#include<iostream>

using namespace std;

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//In A Binary tree how many keys are >= k1  && <= k2

int KeyCount(Node* root,int k1, int k2)
{
   if(root == NULL) return 0;

   if(root.key < k1) return KeyCount(root->right,k1,k2);

   if(root.key > k2) return KeyCount(root->left,k1,k2);

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//Exception handling in threads

//To propagate exceptions between threads you could catch them in the thread 
//function and store them in a place where it can be accessed later.

std::mutex                       g_mutex;
std::vector<std::exception_ptr>  g_exceptions;

void throw_function()
{

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//Post order to pre order travesal without building tree

//Assume tree is full tree just like min max heap

#include<iostream>

using namespace std;


struct Node

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//Head Tail flip solution in room
//Room have many coins none of above on a coin
//u pick one coin if its tail u make it head and place back
//if its head toss it and what it come place same way
//what will be stage after 100000 iterations
// head to tail ratio i mean
#include<iostream>

using namespace std;

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//DEC TO BCD
//BCD format each deciaml digit hold 4 bits 0->0001
//Bitset used here
//std::bitset<32> b(num)

#include<iostream>

using namespace std;

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//splay tree implementation
//Insert operation
//Search operation

//delete not splay nodes

#include<iostream>
using namespace std;

struct Node

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//Hackerrank code challenge

//DNA alignment and scoring

#include<iostream>

using namespace std;


int m[5][5] = {

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//Can we throw exception from destructor 

//yes we can but its not advisable to do this

//Why 

//Bcoz may be some other function make an object of this class on stack in try block 
//and in that try block if exception generated then its unstable state and programme
// be go in abort