FloodFill

class Solution {
    void dfs(vector<vector<int>> &image,int sr,int sc,int newColor, int rows,int cols,int source){
        if(sr<0 || sr>=rows || sc<0  ||sc>=cols)
            return;
        else if(image[sr][sc]!=source)
            return;
        image[sr][sc]=newColor;
        dfs(image,sr-1,sc,newColor,rows,cols,source);
        dfs(image,sr+1,sc,newColor,rows,cols,source);
        dfs(image,sr,sc-1,newColor,rows,cols,source);
        dfs(image,sr,sc+1,newColor,rows,cols,source);
    }
public:
    vector<vector<int>> floodFill(vector<vector<int>>& image, int sr, int sc, int newColor) {
        if(newColor==image[sr][sc])
            return image;
        int rows=image.size();
        int cols=image[0].size();
        int source=image[sr][sc];
        dfs(image,sr,sc,newColor,rows,cols,source);
        return image;
    }
};