import math
def correlation(numbers1, numbers2):
    if not numbers1 or not numbers2:
        print('пусто')
        return(0)

    n = min(len(numbers1), len(numbers2))

    x = numbers1[:n]
    y = numbers2[:n]

    meanx = sum(x)/n
    meany = sum(y)/n

    sum1 = 0
    sum2 = 0
    sum3 = 0

    for i in range (n):
        sum1 += ((x[i] - meanx)*(y[i] - meany))
        sum2 += ((x[i] - meanx)**2)
        sum3 += ((y[i] - meany)**2)
    print(sum1,sum2,sum3)
    return (sum1/math.sqrt(sum2*sum3))