Added Flood Fill Problem Solution

Author: jyoti-bhasin

leetcode/Flood_fill.cpp

@@ -0,0 +1,26 @@
+class Solution {
+public:
+
+    void dfs(int sr,int sc,vector<vector<int>> &ans,vector<vector<int>>& image,int newcolor, int delrow[],int delcol[], int iniColor)
+    {
+        int n=image.size();
+        int m=image[0].size();
+        ans[sr][sc]=newcolor;
+        for(int i=0;i<4;i++)
+        {
+               int nrow= sr+delrow[i];
+               int ncol= sc+delcol[i];
+               if(nrow>=0 && nrow<n && ncol>=0 && ncol<m && image[nrow][ncol]==iniColor && ans[nrow][ncol]!=newcolor)
+                dfs(nrow,ncol,ans,image,newcolor,delrow,delcol,iniColor);
+            }
+        }
+    vector<vector<int>> floodFill(vector<vector<int>>& image, int sr, int sc, int color) {
+
+        int iniColor= image[sr][sc];
+        vector<vector<int>> ans = image;
+        int delrow[]={-1,0,+1,0};
+        int delcol[]={0,+1,0,-1};
+        dfs(sr,sc,ans,image,color,delrow,delcol, iniColor);
+        return ans;
+    }
+};