How to solve this optimally \n\n![image](https://assets.leetcode.com/users/images/1e2ce532-a358-4ac5-982a-cb957e0821e5_1719598324.450537.jpeg)\n![image](https://assets.leetcode.com/users/images/b4926b2b-f4f4-4654-9c95-b366ca74720c_1719598388.8653576.jpeg)\n![image](https://assets.leetcode.com/users/images/a64fccc3-5f5f-4d94-af87-b01632a23c48_1719598394.0647717.jpeg)\n![image](https://assets.leetcode.com/users/images/7ae36b20-7aa2-4ac6-9e15-22bf2a44d70b_1719598400.9921095.jpeg)\n\n

How to solve this optimally \n\n\n\n\n\n\n