76E - Points - CodeForces Solution

implementation math *1700

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Python Code: 

n = int(input())
l = list(zip(*(map(int, input().split())  for i in range(n))))
ssq = sum(x*x for t in l for x in t)
sqs = sum(sum(t)**2 for t in l)
print((n * ssq - sqs))


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