import numpy as np

tab = np.loadtxt('dane.txt')

print(tab.shape[0]) #ilość rzędów
print(tab.shape[1]) #ilość kolumn

length = 1
maxlength = 1

for j in range (0, tab.shape[1]):
    for i in range (1, (tab.shape[0])):
        if (tab[i,j] == tab[i-1, j]):
            length = length + 1
            if (length > maxlength):
                maxlength = length
    length = 1



print(maxlength)