int islandPerimeter(int** grid, int gridRowSize, int gridColSize) {

int count=0;

int repeat=0;

for(int i=0;i!=gridRowSize;++i)

{

for(int j=0;j!=gridColSize;++j)

{

if(grid[i][j]==1)

{

count+=1;

if(j<gridColSize-1)

if(grid[i][j]==grid[i][j+1])

repeat+=1;

}

}

}

```
for(int i=0;i!=gridColSize;++i)
{
for(int j=0;j!=gridRowSize;++j)
{
if(j<gridRowSize-1)
if(grid[j][i]==1 && grid[j+1][i]==grid[j][i])
repeat+=1;
}
}
return 4*count-2*repeat;
```

}