#include<iostream>
using namespace std;
int main()
{
	int a[101][101],n,m;
	cin>>n>>m;
	char aux;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
		{
			cin>>aux;
			if(aux=='.')
				a[i][j]=0;
			else
				a[i][j]=1;
		}
	int x=1;
	int y=1;
	int step=0;
	while(y!=m)
	{
		if(a[x][y+1]==0)
		{
			y++;
			step++;
		}
		if(a[x+1][y]==0)
		{
			x++;
			step++;
		}
	}
	cout<<step;
}