# Our test values:
numbers = [-1, 4, 2, 17, -16, 0, 22, -31]

# 1. Print all even numbers (use 'filter' function)

even_numbers = filter(lambda number: number % 2 == 0, numbers)
print("The first even number in the list is: " + str(next(even_numbers)))

# 2. Print the first positive number (use 'next' and 'filter' functions)

first_positive_number = next(filter(lambda number: number > 0, numbers))
print("First positive number in the list is: " + str(first_positive_number))

# 3. Print the opposite numbers to our test values (use 'map' function)

opposite_numbers = map(lambda number: number * (-1), numbers)
print(str(list(opposite_numbers)))

# 4. Determine if there are any negative numbers (use 'any' and 'map' functions)

negative_numbers = any(map(lambda number: number < 0, numbers))
print("Is given list contains any negative numbers? ", str(negative_numbers))

# 5. Count all negative numbers

count = sum(map(lambda number: number < 0, numbers))
print("List contains:", count, "negative numbers")