Implement an algorithm to determine if a string has all unique characters.

Constraints

• Can we assume the string is ASCII?

  • Yes
  • Note: Unicode strings could require special handling depending on your language

• Can we assume this is case sensitive?

  • Yes

• Can we use additional data structures?

  • Yes

• Can we assume this fits in memory?

  • Yes

  Instructions:

• Program should be written in file build.py

• Function name should be has_unique_chars.

• Input

   Type:  String
   Value: 'AbkLCsfjXwZmpdFEo'
  

• Expected Output

    Type:  Boolean
    Value: False.