"""
Exercise 3.28 from "A primer on..."
Write your own min and max functions, that take a list
as argument and return the max/min value. 
"""

def my_max(seq):
    max_elem = seq[0] # largest value found so far
    for e in seq[1:]:
        if e > max_elem:  #is current element larger than the largest found so far?
            max_elem = e  #if so, update value of max_elem  
    return max_elem


def my_min(seq):
    min_elem = seq[0] 
    for e in seq[1:]:
        if e < min_elem:  #is current element smaller than the smallest found so far?
            min_elem = e  #if so, update value of min_elem  
    return min_elem



l1 = [0, 2, 4, 1, 2]
l2 = [4, 3, 2, 1]
l3 = [1, 2, 3]

print(my_max(l1), my_max(l2), my_max(l3)) #expected output: 4 4 3
print(my_min(l1), my_min(l2), my_min(l3)) #expected output: 0 1 1

"""
Terminal> python maxmin_list.py 
4 4 3
0 1 1
"""