Each file containts an instance description in the following form:

--------------------------------------
N P

d(1,1)	d(1,2)	d(1,3)	...	d(1,N)
d(2,1)	d(2,2)	...		d(2,N)
...
d(N,1)	d(N,2)	...		d(N,N)

w(1) w(2) w(3) ... w(N)

c(1) c(2) c(3) ... c(N)
--------------------------------------

where 
 N is the number of sites hosting customers
 P is the number of facilities to place
 d(i,j) is the assignment cost of a customer located in i to a facility located in j
 w(i) is the demand of a customer located in i
 c(j) is the capacity of a facility built in site j