Gold Rush

You are in a Gold Mine, which is a square grid having $N$ rows and $N$ columns numbered from $1$ to $N$, each cell of the grid containing some positive value of gold. You have to move from $1^{st}$ row to $N^{th}$ row. In each row, you have to select a cell and add the gold value in that cell to the total gold you have, and then you move to the next row and select any cell and so on...