Leetcode 455. Assign Cookies

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题目描述

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.

输入：
输出：排序后的队伍
如：

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.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

贪心算法：先对输入的两个序列对从小到大排序，随后对饼干进行一次遍历。当当前饼干大小能满足该孩子的需求时，则满足度+1，否则判断下一块饼干的大小。

代码

class Solution {public:    int findContentChildren(vector<int>& g, vector<int>& s) {        int j = 0;        int ret = 0;        sort(g.begin(), g.end());        sort(s.begin(), s.end());        for(int i =0;i<s.size();i++){            if(s[i]>=g[j]&&j<g.size()){                ret++;                j++;            }        }        return ret;    }};