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class Solution(object):

def islandPerimeter(self, grid):

"""

:type grid: List[List[int]]

:rtype: int

"""

res = 0;

for i in range(0, len(grid)):

for j in range(0, len(grid[0])):

if grid[i][j] == 1:

if j == 0:

res = res + 1;

elif grid[i][j-1] == 0:

res = res + 1;

if j == len(grid[0])-1:

res = res + 1;

elif grid[i][j+1] == 0:

res = res + 1;

if i == 0:

res = res + 1;

elif grid[i-1][j] == 0:

res = res + 1;

if i == len(grid)-1:

res = res + 1;

elif grid[i+1][j] == 0:

res = res + 1;

return res;