line 1 : | n is an integer denoting the number of the reservoirs |
line i for i=2,...,n+1 : | vi-1 is an integer denoting the volume of the reservoir i-1 |
line i for i=n+1,..,2n : | r q is a pair of integers denoting that there is a tube between reservoir r and reservoir q. The numbers r,q are separated by one space. |