455. Assign Cookies

 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 g_i, which is the minimum size of a cookie that the child will be content with; and each cookie j has a size s_j. If s_j >= g_i, 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: 1Explanation: 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: 2Explanation: 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.

思路：

首先将两个数组排序，然后根据顺序尝试分饼干。

public class Solution {    public int findContentChildren(int[] g, int[] s) {int res = 0;if (g == null || g.length == 0 || s == null || s.length == 0) {return res;}Arrays.sort(g);Arrays.sort(s);int index = 0;for (int i = 0; i < g.length; i++) {if (index >= s.length)break;for (int j = index; j < s.length; j++) {if (s[j] >= g[i]) {index = ++j;res++;break;}}}return res;            }}