cell_arr = [0,1,0,1,1,0,0,1]

# Answer for 1 day should be...
# arr = [1,0,0,1,1,1,1,0]

# Answer for 2 days should be...
# arr = [0,1,1,1,0,0,1,1]

# Answer for 3 days should be...
# arr = [1,1,0,1,1,1,1,1]

def cellCompete(arr, num_of_days):
    new_arr = []

    for j in range(num_of_days):

        for i in range(len(arr)):
            if i == 0:
                if arr[i+1] == 0:
                    new_arr.append(0)
                else:
                    new_arr.append(1)
            elif i == (len(arr) - 1):
                if arr[i-1] == 0:
                    new_arr.append(0)
                else:
                    new_arr.append(1)
            else:
                if arr[i-1] == arr[i+1]:
                    new_arr.append(0)
                else:
                    new_arr.append(1)

        arr = new_arr
        new_arr = []

    return arr


print(cellCompete(cell_arr, 3))