class Solution {
public int[][] floodFill(int[][] image, int sr, int sc, int newColor) {
int [][]foot = new int[image.length][image[0].length];
deleteIslands(sr,sc,newColor,image[sr][sc],image,foot);
return image;
}
int deleteIslands(int i,int j,int newColor,int oldColor,int [][]grid,int [][]foot){
foot[i][j] =1;
if(grid[i][j] != oldColor) return 0;
else{
grid[i][j] = newColor;
if(i<grid.length-1 && foot[i+1][j]==0 && grid[i+1][j]==oldColor){
deleteIslands(i+1,j, newColor,oldColor,grid,foot);
}
if(j<grid[0].length-1 && foot[i][j+1]==0 && grid[i][j+1]==oldColor){
deleteIslands(i,j+1, newColor,oldColor,grid,foot);
}
if(i>0 && foot[i-1][j]==0 && grid[i-1][j]==oldColor){
deleteIslands(i-1,j,newColor,oldColor, grid,foot);
}
if(j>0 && foot[i][j-1]==0 && grid[i][j-1]==oldColor){
deleteIslands(i,j-1,newColor,oldColor, grid,foot);
}
return 0;
}
}
}
作者:你的雷哥
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