1126

x = int(input())

data = []

for i in range(x):

    dt = []

   dt.append(int(input()))

    data.append(dt)

for i in range(x):

    for j in range(i):

        data[i].append(data[i][j-1]-data[i-1][j-1])

for i in range(x):

    for j in range(i):

        print(data[i][j],end=" ")

    print()