# a = input()
# a = int(a)
# list = [0 for j in range(a+1) for i in range(a+1)]
#
# cnt = 1
# h = 0
# m = a-1
#
# dir = 0
#
# while True :
# list[m][h] = cnt
#
# if m==a-1 and h == a-1 :
# break
# cnt+=1
#
# if cnt != 2 and dir==0 and m == a-1:
# h = h+1
# dir = 1
# continue
# if dir==1 and h == a-1 :
# m = m+1
# dir = 0
# continue
#
# if dir==1:
# m = m+1
# h = h-1
#
# elif dir==0:
# m = m-1
# h = h+1
#
# print (list)
# # for i in range(a):
# # for j in range(a):
#
#
#
# a = int(input())
# list = [[0 for j in range(a)] for i in range(a)]
# cnt = 1
# h = a-1
# m = 0
# dir = 0
# while True:
# list[h][m] = cnt
# cnt += 1
# if h == a-1 and m == a-1:
# break
# elif cnt != 2 and dir == 1 and h == a-1:
# dir = 0
# m = m+1
# elif dir == 0 and m==a-1:
# dir = 1
# h = h+1
# elif dir == 1:
# m = m-1
# h = h+1
# else:
# m = m+1
# h = h-1
# for i in range(a):
# for j in range(a):
# print(list[i][j],end = ' ')
# print ()
n = int(input())
list = [[0 for j in range(n)] for i in range(n)]
a,b = map(int,input().split())
a = a-1
b = b-1
cnt = 1
while True:
list[a][b] = cnt
cnt +=1
a = a+1
b =
if