#include<bits/stdc++.h>
using namespace std;
int main()
{
	int t;
	cin >> t;
	for (int f=0;f<t;f++)
	{
		int n;
		cin >> n;
		int a[n];
		for (int i=0;i<n;i++)
		{
			cin >> a[i];      //price of roses;
		}
		int m;
		cin >> m;
		
		sort(a,a+n);
		
		int x=0;
		int y=n-1;
		int chota=0;
		int bada=0;
		while(x<y)
		{
		  if(a[x]+a[y]==m)
		  {
		    chota=a[x];
		    bada=a[y];
		    x++;
		    y--;
		  }
		  else
		  if(a[x]+a[y]>m)
		  {
		    y--;
		  }
		  else
		  if(a[x]+a[y]<m)
		  {
		    x++;
		  }
		}
		
		cout<<"Deepak should buy roses whose prices are "<<chota<<" and "<<bada<<" ."<<endl;
	/*	int x=0,y=0,z=INT_MAX;
		for (int i=0;i<n;i++)
		{
			for (int j=i+1;j<n;j++)
			{
				if (a[i]+a[j]==m)
				{
				  if(abs(a[j]-a[i])<z){
				  
				  x=a[i];
				  y=a[j];
				    z=abs(a[j]-a[i]);
				  }
				  }
					//cout << a[i] << "and" << a[j]; 
					//break;
				}
			}
			cout<<x<<" "<<y<<endl;*/
		}
		cout<<endl;
	}
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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}