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#include <iostream>

// Number of participants
unsigned int n;

// Minimum number of T-Shirts
unsigned int k;

unsigned int* points;

void display()
{
	std::cout << n;
	std::cout << " ";
	std::cout << k << std::endl;
	for (int i = 0; i < n; i++)
	{
		std::cout << points[i];
		if (i < n - 1)
		{
			std::cout << " ";
		}
		else
		{
			std::cout << std::endl;
		}
	}
}

void swap(unsigned int* x, unsigned int* y)
{
	unsigned int temp = *x;
	*x = *y;
	*y = temp;
}

void bubbleSort(unsigned int arr[], int n)
{
	for (int i = 0; i < n; i++)
	{
		for (int j = 1; j < n - i; j++)
		{
			if (arr[j - 1] < arr[j])
			{
				swap(&arr[j - 1], &arr[j]);
			}
		}
	}
}

int main()
{
	std::cin >> n >> k;

	points = new unsigned int[n];

	for (int i = 0; i < n; i++)
	{
		std::cin >> points[i];
	}
	bubbleSort(points, n);

	unsigned int result = k;
	while (points[result - 1] == points[result])
	{
		result++;
	}

	std::cout << result;
	//display();
	return 0;
}