소스 코드 제출

# arr=[]
# # for i in range(0, 20):
# #     for j in range(0, 20)
# for i in range(19):
#     x = list(map(int, input().split()))
#     arr.append(x)
#
# n = int(input())
#
# for i in range(n):
#     x, y = map(int, input().split())
#     for k in range(19):
#         if arr[k][y - 1] == 1:
#             arr[k][y - 1] = 0
#         else:
#             arr[k][y - 1] = 1
#
#         if arr[x - 1][k] == 1:
#             arr[x - 1][k] = 0
#         else:
#             arr[x-1][k] = 1
#
# for i in range(19):
#     for j in range(19):
#         print(arr[i][j], end=' ')
#     print()

h, w=map(int, input().split())
n=int(input())
for i in range()