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#include <cstdio>
#include <string>
#include <list>

using namespace std;

int main()
{
	int n = -1;
	int k = -1;

	int c = 0;
	int x = 0;
	int y = 0;
	list<int> d;
	bool first = true;

	scanf("%d %d", &n, &k);

	for (int i = 0; i < n; i++)
	{
		scanf("%d", &x);

		if(first)
			d.push_front(x);
		else {
			if (x >= d.front())
			{
				d.push_front(x);
			}
			else
			{
				d.push_back(x);
			}
		}
		first = false;
	}


	x = d.front();
	d.pop_front();
	for (int i = 1; i < n; i++)
	{
		y = d.front();
		d.pop_front();
		if (x == y)
			k++;
		x = y;
	}

	printf("%d", k);

	return 0;
}