R-1.3.py

def minmax(data):
    max = data[0]
    min = data[0]
    for k in data:
        if(k > max):
            max = k
        if(k < min):
            min = k
    print('max: ' +  str(max))
    print('min: ' +  str(min))

minmax([2, 3, 4, 5,-1])