#Aufgabe 1a)
my_list = [[3,0,-2,11],[0,0,9,3],[0,7,0,0],[0,0,0,-3]]

#Aufgabe 1b)
#my_list = [[], [], [], []]
#MAX_LENGTH = 4
#for i in range(0, MAX_LENGTH):
#    for j in range(0, MAX_LENGTH):
#        n = int(input("Enter n:"))
#        my_list[i].insert(j, n)
#        
#    print(my_list) 

#Aufgabe 1d)
for i, row in enumerate(my_list):
    for j, item in enumerate(row):
        print(f'a[{i}] [{j}] = {item} ', end=' ')
    print()