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.

Have you met this question in a real interview? 

Yes

Example

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

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

Note

The characters of B in A are not necessary continuous or ordered.

public class Solution {

    /**

     * @param A : A string includes Upper Case letters

     * @param B : A string includes Upper Case letter

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

     */

    public boolean compareStrings(String A, String B) {

        // write your code here

        

        int[] count = new int[26];

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

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

        }

        

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

            count[B.charAt(i) - 'A']--;

            if(count[B.charAt(i) - 'A'] < 0) return false;

        }

        return true;

        

    }

}