from collections import deque

grid = []
n = int(input())
for i in range(n):
    grid.append( list(map(int, input().split())) )

prev = {(0, 0): None}
que = deque()
que.append((0, 0))
visited = [[0] * n for _ in range(n)]
visited[0][0] = 1

while len(que) > 0:
    i, j = que.popleft()
    if i == n-1 and j == n-1:
        break

    for ii, jj in [[i-1, j], [i+1, j], [i, j-1], [i, j+1]]:
        if ii >= 0 and ii < n and jj >= 0 and jj < n and visited[ii][jj] == 0 and grid[ii][jj] == 0:
            visited[ii][jj] = 1
            que.append((ii, jj))
            prev[(ii, jj)] = (i, j)

cur = (n-1, n-1)
que = deque()
while cur != None:
    que.appendleft((cur))
    cur = prev[cur]
for i, j in que:
    print(i, j)