Mean, Var, and Std

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    import numpy as np

    n, m = map(int, input().split())

    array = np.array([list(map(int,input().split())) for _ in range(n)])

    mean = np.mean(array,axis=1)

    var = np.var(array, axis=0)

    std = np.std(array)

    print(mean) print(var) print(f"{std:.11f}")