lealLuo

class Solution:
    def flipAndInvertImage(self, A):
        """
        :type A: List[List[int]]
        :rtype: List[List[int]]
        """
        def invert(value):
            if value==1:
                return 0
            else:

lealLuo

class Solution:
    def maxIncreaseKeepingSkyline(self, grid):
        """
        :type grid: List[List[int]]
        :rtype: int
        """
        
        # return skyline from Top or Bottom
        def fromTop(grid):
            listhori = []

lealLuo

class Solution:                    
    def findWords(self, words):
        """
        :type words: List[str]
        :rtype: List[str]
        """    
        # judge which row the input char belongs to
        def judgeRow(c):
            row1 =['q','w','e','r','t','y','u','i','o','p','Q','W','E','R','T','Y','U','I','O','P']
            row2 =['a','s','d','f','g','h','j','k','l','A','S','D','F','G','H','J','K','L']