leetcode-455-easy

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.

Example 1:

Input: g = [1,2,3], s = [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: g = [1,2], s = [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.
Constraints:

1 <= g.length <= 3 * 104
0 <= s.length <= 3 * 104
1 <= g[i], s[j] <= 231 - 1

思路一: 排序，然后遍历孩子需求。题目不难，做的时候 begin 下标搞错了，仔细再看一遍，发现没有理解错题目，最后发现 begin 没有赋值

public int findContentChildren(int[] g, int[] s) {
    Arrays.sort(g);
    Arrays.sort(s);

    int result = 0;
    int begin = 0;
    for (int min : g) {

        begin = find(s, min, begin);
        if (begin == -1) {
            return result;
        }

        result++;
        begin++;
    }

    return result;
}

public int find(int[] s, int min, int begin) {
        for (; begin < s.length; begin++) {
        if (s[begin] >= min) {
        return begin;
        }
        }

        return -1;
        }