l=[100, 60, 80]

p={i:[] for i in l}

for i in l:

   for weight in range(100):

       for lenght in range(100):

           if weight*2 + lenght<=i:

               p[i].append((weight * lenght, weight, lenght))

for i in p.keys():

   print(i, max(p[i], key=lambda x: x[0]))