#!/usr/bin/env python3 import math def gauss_sum(n: int) -> int: # START PART 1 return n # END PART 1 START PART 2 return n * (n + 1) // 2 # END PART 2 def main() -> None: with open("input", "r", encoding="utf-8") as f: data = list(map(int, f.read().split(","))) print( min( sum(gauss_sum(abs(i - data[j])) for j in range(len(data))) for i in range(min(data), max(data) + 1) ) ) if __name__ == "__main__": main()