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First :mathematically solution in Clear category for Missing Number by keromage
def missing_number(items: list[int]) -> int:
# sum_total : sum of arithmetic progressions
sum_total = int(((min(items) + max(items)) * (len(items) + 1) / 2))
sum_partial = sum(items)
return sum_total - sum_partial
print("Example:")
print(missing_number([1, 4, 2, 5]))
# These "asserts" are used for self-checking
assert missing_number([1, 4, 2, 5]) == 3
assert missing_number([2, 6, 8]) == 4
print("The mission is done! Click 'Check Solution' to earn rewards!")
March 20, 2024
