01. Smallest of Three Numbers

def result():
    first_num = int(input())
    second_num = int(input())
    third_num = int(input())

    if first_num < second_num and first_num < third_num:
        return first_num
    elif second_num < first_num and second_num < third_num:
        return second_num
    else:
        return third_num

print(result())


Решение с min():

def result():
    first_num = int(input())
    second_num = int(input())
    third_num = int(input())
    return min(first_num, second_num, third_num)

print(result())


Или тарикатската:)

def result():
    return min(int(input()), int(input()), int(input()))

print(result())