lista = [0] * 3
lista = [0,0,0]

m = [ [0,0],[0,0,0],[0,0,0] ]
print(len(m[0]))
print(len(m[1]))

matrizgrandona = [[] * 20 for i in range(20)]

m = [[0] * 3 for i in range(3)]

print(m)
m[0][0] = 100
print(m)
m[2][2] = 100
print(m)
print(m[2][2])
