황소개발자

import sys input = sys.stdin.readline dx = [1, -1, 0, 0] dy = [0, 0, 1, -1] def bfs(y, x, count, total): q = [[y, x]] mat[y][x] = count total += 1 while q: now = q.pop(0) for i in range(4): ny = now[0] + dy[i] nx = now[1] + dx[i] if 0