q=s=0
while (q < 100):
	if (q < 25):
		s+=(q**2)+18
	else:
		s+=625+18*(q-24)
	q+=1

if (q < 25):
	print "%d : %d (individual cost %d)" % (q, s, (q**2)+18)
else:
	print "%d : %d (individual cost %d)" % (q, s, 625+18*(q-24))