6 lines
184 B
Python
6 lines
184 B
Python
L=list(map(int,__import__("sys").stdin.read().split(",")))
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def cost(a,b):
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n=abs(a-b)
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return ((n+1)*n)//2
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print(min(sum(cost(l,i) for l in L) for i in range(min(L), max(L)+1)))
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