import sys# 큰 입출력 값을 받기 위해 사용input = sys.stdin.readlineN =int(input())map = [list(map(int, input().strip())) for _ in range(N)]chk = [[False]*N for _ in range(N)]result=[]each = 0 dy=[0,1,0,-1]dx=[1,0,-1,0]def dfs(y, x): global each # 크기를 구하기 위해 each에 +1씩 더하기 each +=1 for k in range(4): ny = y + dy[k] nx = x + dx[k] if 0