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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 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. 

Solution (Ruby)

1. Greedy

# @param {Integer[]} g# @param {Integer[]} s# @return {Integer}deffind_content_children(g,s)i,j=0,0ret=0g.sort!s.sort!whilei < g.lengthandj < s.lengthifs[j] >= g[i]ret += 1i += 1endj += 1endreturnretend

Solutions (Rust)

1. Greedy

implSolution{pubfnfind_content_children(g:Vec<i32>,s:Vec<i32>) -> i32{letmut g = g;letmut s = s; g.sort_unstable(); s.sort_unstable();letmut i = 0;letmut j = 0;letmut ret = 0;while i < g.len() && j < s.len(){if s[j] >= g[i]{ ret += 1; i += 1;} j += 1;} ret }}
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