Cherry Pickup 2

class Solution {
    boolean flag=false;
    int idx,col1,col2;
    int dp[][][];
    public int cherryPickup(int[][] grid) {
         idx=grid.length;
        col1=grid[0].length;
        col2=grid[0].length; 
        dp=new int[idx][col1][col2];
        
    for (int[][] innerRow: dp)
    {
        for (int[] innerInnerRow: innerRow)
        {
        Arrays.fill(innerInnerRow, -1);
        }
    }
        // System.out.println("i"+idx);
        // System.out.println("col1"+col1);
        // System.out.println("col2"+col2);

        return cherryPickup(grid, 0, 0, col2-1);
    }
    
    int cherryPickup(int[][] grid, int i, int rob1, int rob2){
        //handling base
        if(i>=idx) return 0; //returning Integer.MIN_VALUE here doesnt work for some reason i couldnt understand
        if(rob1<0 || rob1>=col1) return Integer.MIN_VALUE;
        if(rob2>=col2 || rob2<0) return Integer.MIN_VALUE;
        if(dp[i][rob1][rob2]!=-1) return dp[i][rob1][rob2];
        int curr=0;
        curr+=grid[i][rob1];
        curr+=grid[i][rob2];
        if(rob1==rob2) curr-=grid[i][rob1];
        int ans=Integer.MIN_VALUE;
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1-1, rob2-1));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1-1, rob2));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1-1, rob2+1));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1, rob2-1));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1, rob2));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1, rob2+1));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1+1, rob2-1));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1+1, rob2));
        ans=Math.max(ans, curr+cherryPickup(grid,i+1,rob1+1, rob2+1));
        dp[i][rob1][rob2]=ans;
        return ans;
    }
}
#Status: Took help.