383. Ransom Note
题目描述:Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines ; otherwise, it will return false.
Each letter in the magazine string can only be used once in your ransom note.
Note:
You may assume that both strings contain only lowercase letters.canConstruct("a", "b") -> false canConstruct("aa", "ab") -> false canConstruct("aa", "aab") -> true
题目大意:给定两个字符串,问是否可以用magazines字符串中的字符组成ransom note 字符串
代码
package String; /** * @Author OovEver * @Date 2017/12/6 23:02 */ public class LeetCode383 { public boolean canConstruct(String ransomNote, String magazine) { char[] record = new char[26]; for(int i=0;i<magazine.length();i++) { record[magazine.charAt(i) - 'a']++; } for(int i=0;i<ransomNote.length();i++) { if (record[ransomNote.charAt(i) - 'a'] < 1) { return false; } record[ransomNote.charAt(i) - 'a']--; } return true; } }