[leetcode-455-Assign Cookies]

Posted 2020-09-25 hellowOOOrld

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.

 思路：

先排序，然后为每一个人选择最小的而且满足要求的饼干，记录位置。

int findContentChildren(vector<int>& g, vector<int>& s)
     {
         int people = g.size(),cookie = s.size();
         sort(g.begin(), g.end());
         sort(s.begin(), s.end());
         int content = 0;
         int curindex = 0;//代表饼干的索引
         for (int i = 0; i < people;i++)
         {
             for (int j = curindex; j < cookie; j++)
             {
                 if (s[j]>=g[i])
                 {
                     content++;
                     curindex = j + 1;//j已经被分出去了 得从下一个开始
                     break;
                 }
             }
         }
         return content;
     }