how to get largerst number among 3 numbers

max(a, b, c):
  if a > b:
    if a > c:
      return a
    else:
      return c
  else:
    if b > c:
      return b
    else:
      return c

def min(a, b, c):
  if a < b:
    if a < c:
      return a
    else:
      return c
  else:
    if b < c: