# find the maximum
maximum = score[0]
for i in range(1, len(score)):
  if maximum < score[i]: maximum = score[i]
________________________________________
# find the minimum 
minimum = score[0]
for i in range(1, len(score)):
  if minimum > score[i]: minimum = score[i]
________________________________________
# find maximum AND minimum
maximum = score[0]
minimum = score[0]
for i in range(1, len(score)):
  if maximum < score[i]: maximum = score[i]
  if minimum > score[i]: minimum = score[i]