解题思路:
注意事项:
参考代码:
def dfs(x=0, y=0, add_all=0): global map_, visited, around, sum_, res, end_flag if add_all == sum_ // 2: end_flag = 1 return if not visited[x][y]: visited[x][y] = True add_all += map_[x][y] res += 1 for i in around: if 0 <= i[0] + x < n and 0 <= i[1] + y < m: dfs(i[0] + x, i[1] + y, add_all) if end_flag: return visited[x][y] = False res -= 1 add_all -= map_[x][y] m, n = map(int, input().split()) map_ = [list(map(int, input().split()))[:m] for _ in range(n)] visited = [[False for _ in range(m)] for _ in range(n)] around = [[1, 0], [0, 1], [-1, 0], [0, -1]] sum_, res, end_flag = sum(sum(i) for i in map_), 0, 0 dfs() print(res)
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