Lintcode: Compare Strings

Compare two strings A and B, determine whether A contains all of the characters in B.



The characters in string A and B are all Upper Case letters.



Example

For A = "ABCD", B = "ABC", return true.



For A = "ABCD" B = "AABC", return false.

int数组统计字符出现次数

 1 public class Solution {

 2     /**

 3      * @param A : A string includes Upper Case letters

 4      * @param B : A string includes Upper Case letter

 5      * @return :  if string A contains all of the characters in B return true else return false

 6      */

 7     public boolean compareStrings(String A, String B) {

 8         int[] AA = new int[26];

 9         int[] BB = new int[26];

10         for (int i=0; i<A.length(); i++) {

11             AA[A.charAt(i) - 'A']++;

12         }

13         for (int i=0; i<B.length(); i++) {

14             BB[B.charAt(i) - 'A']++;

15             if (BB[B.charAt(i) - 'A'] > AA[B.charAt(i) - 'A']) return false;

16         }

17         return true;

18     }

19 }