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defcavityMap(grid):# Write your code hereforiinrange(1,len(grid)-1):forjinrange(1,len(grid[i])-1):ifgrid[i][j]>max(grid[i-1][j],grid[i][j-1],grid[i+1][j],grid[i][j+1]):grid[i]=grid[i][:j]+'X'+grid[i][j+1:]returngrid

A pythonic solution

defcavityMap(grid):# Write your code hereforiinrange(1,len(grid)-1):forjinrange(1,len(grid[i])-1):ifgrid[i][j-1]<grid[i][j]andgrid[i-1][j]<grid[i][j]andgrid[i][j+1]<grid[i][j]andgrid[i+1][j]<grid[i][j]:grid[i]=''.join(['X'ifa==jelsedfora,dinenumerate(grid[i])])returngrid

## Cavity Map

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Update: This is nice too

A pythonic solution