def mymin(array):
    a = A[0]
    for b in A:
        if (a > b):
            a = b

    return a


def mymax(array):
    a = A[0]
    for b in A:
        if (a < b):
            a = b

    return a


def mysum(array):
    b = 0
    for a in A:
        b += a

    return b


A = [1, 4, 3, 7, 2, 9, 1, 10]
result = mymin(A)
print(result)

A = [1, 4, 3, 7, 2, 9, 1, 10]
result = mymax(A)
print(result)

A = [1, 4, 3, 7, 2, 9, 1, 10]
result = mysum(A)
print(result)