노트

import sys sys.setrecursionlimit(10 ** 6) n,m = map(int,sys.stdin.readline().split()) array = [list(map(int,sys.stdin.readline().strip())) for _ in range(n)] visted = [[False]*m for _ in range(n)] d = [[1,0],[0,1],[-1,0],[0,-1]] def dfs(r,c): global flag if r>=n: flag=True if 0