give the code in c$++,$dont copy paste the code from anywhere,In a flooding scenario, a grid of size $mn$ is used to represent a region

affected by floods, with $\text{'}F\text{'}$ denoting flooded areas and $\text{'}N\text{'}$ for non$-$flooded areas that are

safe. The situation becomes critical when a region marked $\text{'}N\text{'}$ is surrounded by $\text{'}F\text{'}$ on all

four cardinal directions $($up$,$ down, left, right$),$ indicating that floodwaters fully encircle

the non$-$flooded area. These areas cannot be saved. The task is to update the grid to

show the final configuration of the flooded areas and those that remain dry. A region

of $N$ comprises all the $Ns$ that are adjacent to another $N$ in any of the four cardinal

directions. Constraints:

$m==$ board. length

$n==$ board $[$i$].$ length

$1m,n200$

board$[$i$][$j$]$ is $\text{'}$F$\text{'}$ or $\text{'}$N$\text{'}.$

Input:

Output: