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#!/usr/bin/env python3
import sys
def numbers_game(ints: list) -> list:
# Check we have an even number of items
if len(ints) % 2 != 0:
raise ValueError('Please provide an even number of items!')
# Sort the list
ints = sorted(ints)
for i in range(0, len(ints), 2):
# Switch the pairs of numbers around
ints[i], ints[i+1], = ints[i+1], ints[i]
return ints
def main():
# Convert input into integers
array = [int(n) for n in sys.argv[1:]]
result = numbers_game(array)
print(tuple(result))
if __name__ == '__main__':
main()
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