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判断岛屿数量

@param grid char字符型二维数组

@return int整型

class Solution: def solve(self , grid: List[List[str]]) -> int: # write code here row = len(grid) col = len(grid[0]) res = 0 if row == 0 or col == 0: return 0 def dfs(x,y): grid[x][y] = '0' for c in [[1,0], [-1,0], [0,1], [0,-1]]: nx = x + c[0] ny = y + c[1] if 0<=nx<row and 0<=ny<col and grid[nx][ny] == '1': dfs(nx,ny)

    for i in range(row):
        for j in range(col):
            if grid[i][j] == '1':  
                dfs(i,j)
                res += 1
    return res