Y = Z = ones(100,100);
X = zeros(100,100);

    for( i = 1; i <= 100; ++i)
	for( j = 1; j <= 100; ++j) {
	    X(i,j) = 0;
	    for( k = 1; k <= 100; ++k)
		X(i,j) = X(i,j) + Y(i,k) * Z(k,j);
	}
