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Count inversions in an array

Here given code implementation process.

//C Program 
//Count inversions in an array
#include <stdio.h>
 //print the array elements
void display(int arr[], int size)
{
	int i = 0;
	for (i = 0; i < size; i++)
	{
		printf("  %d", arr[i]);
	}
}
//Count all inversions pairs in given array
void count_inversions(int arr[], int size)
{
	int counter = 0;
	for (int i = 0; i < size; ++i)
	{
		for (int j = i + 1; j < size; ++j)
		{
			if (arr[i] > arr[j])
			{
				//When get a new inversions pair
				counter++;
			}
		}
	}
	printf("\n Array : ");
	display(arr, size);
	printf("\n Inversions pair : %d\n", counter);
}
int main()
{
	//Define array elements
	int arr[] = {
		1,
		-4,
		7,
		6,
		4,
		5,
		8
	};
	//Count size of array
	int size = sizeof(arr) / sizeof(arr[0]);
	count_inversions(arr, size);
	return 0;
}

Output

 Array :   1  -4  7  6  4  5  8
 Inversions pair : 6
// Java program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	public void display(int[] arr, int size)
	{
		int i = 0;
		for (i = 0; i < size; i++)
		{
			System.out.print(" " + arr[i]);
		}
	}
	//Count all inversions pairs in given array
	public void count_inversions(int[] arr, int size)
	{
		int counter = 0;
		for (int i = 0; i < size; ++i)
		{
			for (int j = i + 1; j < size; ++j)
			{
				if (arr[i] > arr[j])
				{
					//When get a new inversions pair
					counter++;
				}
			}
		}
		System.out.print("\n Array : ");
		display(arr, size);
		System.out.print("\n Inversions pair : " + counter + "\n");
	}
	public static void main(String[] args)
	{
		MyArray obj = new MyArray();
		//Define array elements
		int[] arr = {
			1,
			-4,
			7,
			6,
			4,
			5,
			8
		};
		//Count size of array
		int size = arr.length;
		obj.count_inversions(arr, size);
	}
}

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
//Include header file
#include <iostream>

using namespace std;
// C++ program 
// Count inversions in an array
class MyArray
{
	public:
		//print given array elements
		void display(int arr[], int size)
		{
			int i = 0;
			for (i = 0; i < size; i++)
			{
				cout << " " << arr[i];
			}
		}
	//Count all inversions pairs in given array
	void count_inversions(int arr[], int size)
	{
		int counter = 0;
		for (int i = 0; i < size; ++i)
		{
			for (int j = i + 1; j < size; ++j)
			{
				if (arr[i] > arr[j])
				{
					//When get a new inversions pair
					counter++;
				}
			}
		}
		cout << "\n Array : ";
		this->display(arr, size);
		cout << "\n Inversions pair : " << counter << "\n";
	}
};
int main()
{
	MyArray obj = MyArray();
	int arr[] = {
		1 , -4 , 7 , 6 , 4 , 5 , 8
	};
	//Count size of array
	int size = sizeof(arr) / sizeof(arr[0]);
	obj.count_inversions(arr, size);
	return 0;
}

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
//Include namespace system
using System;
// C# program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	public void display(int[] arr, int size)
	{
		int i = 0;
		for (i = 0; i < size; i++)
		{
			Console.Write(" " + arr[i]);
		}
	}
	//Count all inversions pairs in given array
	public void count_inversions(int[] arr, int size)
	{
		int counter = 0;
		for (int i = 0; i < size; ++i)
		{
			for (int j = i + 1; j < size; ++j)
			{
				if (arr[i] > arr[j])
				{
					//When get a new inversions pair
					counter++;
				}
			}
		}
		Console.Write("\n Array : ");
		display(arr, size);
		Console.Write("\n Inversions pair : " + counter + "\n");
	}
	public static void Main(String[] args)
	{
		MyArray obj = new MyArray();
		int[] arr = {
			1 , -4 , 7 , 6 , 4 , 5 , 8
		};
		//Count size of array
		int size = arr.Length;
		obj.count_inversions(arr, size);
	}
}

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
<?php
// Php program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	public	function display( $arr, $size)
	{
		$i = 0;
		for ($i = 0; $i < $size; $i++)
		{
			echo " ". $arr[$i];
		}
	}
	//Count all inversions pairs in given array
	public	function count_inversions( $arr, $size)
	{
		$counter = 0;
		for ($i = 0; $i < $size; ++$i)
		{
			for ($j = $i + 1; $j < $size; ++$j)
			{
				if ($arr[$i] > $arr[$j])
				{
					//When get a new inversions pair
					$counter++;
				}
			}
		}
		echo "\n Array : ";
		$this->display($arr, $size);
		echo "\n Inversions pair : ". $counter ."\n";
	}
}

function main()
{
	$obj = new MyArray();
	//Define array elements
	$arr = array(1, -4, 7, 6, 4, 5, 8);
	//Count size of array
	$size = count($arr);
	$obj->count_inversions($arr, $size);
}
main();

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
// Node Js program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	display(arr, size)
	{
		var i = 0;
		for (i = 0; i < size; i++)
		{
			process.stdout.write(" " + arr[i]);
		}
	}
	//Count all inversions pairs in given array
	count_inversions(arr, size)
	{
		var counter = 0;
		for (var i = 0; i < size; ++i)
		{
			for (var j = i + 1; j < size; ++j)
			{
				if (arr[i] > arr[j])
				{
					//When get a new inversions pair
					counter++;
				}
			}
		}
		process.stdout.write("\n Array : ");
		this.display(arr, size);
		process.stdout.write("\n Inversions pair : " + counter + "\n");
	}
}

function main()
{
	var obj = new MyArray();
	//Define array elements
	var arr = [1, -4, 7, 6, 4, 5, 8];
	//Count size of array
	var size = arr.length;
	obj.count_inversions(arr, size);
}
main();

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
#  Python 3 program 
#  Count inversions in an array
class MyArray :
	# print given array elements
	def display(self, arr, size) :
		i = 0
		while (i < size) :
			print(" ", arr[i], end = "")
			i += 1
		
	
	# Count all inversions pairs in given array
	def count_inversions(self, arr, size) :
		counter = 0
		i = 0
		while (i < size) :
			j = i + 1
			while (j < size) :
				if (arr[i] > arr[j]) :
					# When get a new inversions pair
					counter += 1
				
				j += 1
			
			i += 1
		
		print("\n Array : ", end = "")
		self.display(arr, size)
		print("\n Inversions pair : ", counter ,"\n", end = "")
	

def main() :
	obj = MyArray()
	# Define array elements
	arr = [1, -4, 7, 6, 4, 5, 8]
	# Count size of array
	size = len(arr)
	obj.count_inversions(arr, size)

if __name__ == "__main__": main()

Output

 Array :   1  -4  7  6  4  5  8
 Inversions pair :  6
#  Ruby program 
#  Count inversions in an array
class MyArray

	# print given array elements
	def display(arr, size)
	
		i = 0
		while (i < size)
		
			print(" ", arr[i])
			i += 1
		end
	end
	# Count all inversions pairs in given array
	def count_inversions(arr, size)
	
		counter = 0
		i = 0
		while (i < size)
		
			j = i + 1
			while (j < size)
			
				if (arr[i] > arr[j])
				
					# When get a new inversions pair
					counter += 1
				end
				j += 1
			end
			i += 1
		end
		print("\n Array : ")
		self.display(arr, size)
		print("\n Inversions pair : ", counter ,"\n")
	end
end
def main()

	obj = MyArray.new()
	# Define array elements
	arr = [1, -4, 7, 6, 4, 5, 8]
	# Count size of array
	size = arr.length
	obj.count_inversions(arr, size)
end
main()

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6

// Scala program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	def display(arr: Array[Int], size: Int): Unit = {
		var i: Int = 0;
		while (i < size)
		{
			print(" " + arr(i));
			i += 1;
		}
	}
	//Count all inversions pairs in given array
	def count_inversions(arr: Array[Int], size: Int): Unit = {
		var counter: Int = 0;
		var i: Int = 0;
		while (i < size)
		{
			var j: Int = i + 1;
			while (j < size)
			{
				if (arr(i) > arr(j))
				{
					//When get a new inversions pair
					counter += 1;
				}
				j += 1;
			}
			i += 1;
		}
		print("\n Array : ");
		display(arr, size);
		print("\n Inversions pair : " + counter + "\n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: MyArray = new MyArray();
		//Define array elements
		var arr: Array[Int] = Array(1, -4, 7, 6, 4, 5, 8);
		//Count size of array
		var size: Int = arr.length;
		obj.count_inversions(arr, size);
	}
}

Output

 Array :  1 -4 7 6 4 5 8
 Inversions pair : 6
// Swift program 
// Count inversions in an array
class MyArray
{
	//print given array elements
	func display(_ arr: [Int], _ size: Int)
	{
		var i: Int = 0;
		while (i < size)
		{
			print(" ", arr[i], terminator: "");
			i += 1;
		}
	}
	//Count all inversions pairs in given array
	func count_inversions(_ arr: [Int], _ size: Int)
	{
		var counter: Int = 0;
		var i: Int = 0;
		while (i < size)
		{
			var j: Int = i + 1;
			while (j < size)
			{
				if (arr[i] > arr[j])
				{
					//When get a new inversions pair
					counter += 1;
				}
				j += 1;
			}
			i += 1;
		}
		print("\n Array : ", terminator: "");
		self.display(arr, size);
		print("\n Inversions pair : ", counter ,"\n", terminator: "");
	}
}
func main()
{
	let obj: MyArray = MyArray();
	//Define array elements
	let arr: [Int] = [1, -4, 7, 6, 4, 5, 8];
	//Count size of array
	let size: Int = arr.count;
	obj.count_inversions(arr, size);
}
main();

Output

 Array :   1  -4  7  6  4  5  8
 Inversions pair :  6
Last updated on by Kalkicode




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