#define MAX_NM 200

#include <fstream>
using namespace std;

ifstream fin("bmatrix.in");
ofstream fout("bmatrix.out");

int n, m;
int A[MAX_NM + 1][MAX_NM + 1];

int main()
{
	fin >> n >> m;
	
	for (int i = 1; i <= n; ++i)
	{
		for (int j = 1; j <= m; ++j)
		{
			fin >> A[i][j];
		}
	}
	
	for (int k = 1; k <= n; ++k)
	{
		
		for (int i = 1; i <= n; ++i)
		{
			for (int j = 1; j <= m; ++j)
			{
				A[i][j] *= A[i - 1][j] + A[i][j - 1];
			}
		}
	}
	
	fout << A[2][1];
	
	fin.close();
	fout.close();
	return 0;
}