【leetcode】455. Assign Cookies【E】

Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one cookie. Each child i has a greed factor gi, which is the minimum size of a cookie that the child will be content with; and each cookie j has a size sj. If sj >= gi, we can assign the cookie j to the child i, and the child i will be content. Your goal is to maximize the number of your content children and output the maximum number.

Note:
You may assume the greed factor is always positive. 
You cannot assign more than one cookie to one child.

Example 1:

Input: [1,2,3], [1,1]

Output: 1

Explanation: You have 3 children and 2 cookies. The greed factors of 3 children are 1, 2, 3. 
And even though you have 2 cookies, since their size is both 1, you could only make the child whose greed factor is 1 content.
You need to output 1.

Example 2:

Input: [1,2], [1,2,3]

Output: 2

Explanation: You have 2 children and 3 cookies. The greed factors of 2 children are 1, 2. 
You have 3 cookies and their sizes are big enough to gratify all of the children, 
You need to output 2.

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這個就是簡單的貪心

g和s都倒序排列

挨個比較，讓最大的餅乾給最能吃的小朋友

class Solution(object):
    def findContentChildren(self, g, s):
        
        g.sort(reverse = True)
        s.sort(reverse = True)
        
        #print g,s
        
        i,j = 0,0
        res = 0
        
        while j < len(s) and i < len(g):
            if s[j] >= g[i]:
                res += 1
                j += 1
                i += 1
            else:
                i += 1
        return res