250730

# card = []

# N = int(input())

# for i in range(N-1):

# card.append(int(input()))

# for i in range(1, N+1):

# if not i in card:

# print(i)

# a = input()

# count = [0 for _ in range(26)]

# for i in range(len(a)):

# num = ord(a[i])-ord('a')

# if not num<0 or num>26:

# count[num] += 1

# for i in range(26):

# print(f"{chr(i+97)}:{count[i]}")

# n = int(input())

# a = [[0 for _ in range(n)] for _ in range(n)]

# b = 1

# setting = 1

#

# for i in range(n):

# if i % 2 == 0:

# for j in range(n): # 0, 1, 2, 3, ..., n-1

# a[i][j] = b

# b += 1

# else:

# for j in range(n-1, -1, -1): # n-1, n-2, n-3, ..., 0

# a[i][j] = b

# b += 1

#

#

# for i in range(n):

# for j in range(n):

# print(a[i][j], end=' ')

# print()

# n = int(input())

# a = [[0 for _ in range(n)] for _ in range(n)]

# b = 1

#

# for i in range(n):

# if i % 2 == 0:

# for j in range(n): # 0, 1, 2, 3, ..., n-1

# a[j][i] = b

# b += 1

# else:

# for j in range(n-1, -1, -1): # n-1, n-2, n-3, ..., 0

# a[j][i] = b

# b += 1

#

#

# for i in range(n):

# for j in range(n):

# print(a[i][j], end=' ')

# print()

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

# a = [[0 for _ in range(m)] for _ in range(n)]

# b = 1

# for j in range(m):

# if j%2 == 0:

# for i in range(n):

# a[i][j] = b

# b += 1

# else:

# for i in range(n - 1, -1, -1):

# a[i][j] = b

# b += 1

# for i in range(n - 1, -1, -1):

# for j in range(m - 1, -1, -1):

# print(a[i][j], end=' ')

# print()

N = int(input())

y, x = map(int, input().split(" "))

a = [[0 for _ in range(N)] for _ in range(N)]

for i in range(N):

a[i][x-1] = abs((i - y) + 1) +1

for i in range(N):

a[y-1][i] = abs((i - x) + 1) +1

for i in range(N):

if i == y-1:

continue

else:

cell = a[i][x-1]

for j in range(N):

a[i][j] = abs(x-1-j)+cell

for i in range(N):

for j in range(N):

print(a[i][j], end=' ')

print()