Code Fights - differentSymbolsNaive

README.md

Given a string, find the number of different characters in it.

Example

For s = "cabca", the output should be
differentSymbolsNaive(s) = 3.

There are 3 different characters a, b and c.

Input/Output

• [time limit] 4000ms (py3)

• [input] string s

  A string of lowercase latin letters.

  Guaranteed constraints:

  3 ≤ s.length ≤ 15.
  

• [output] integer

different_symbols_naive.py

def different_symbols_naive(s: str):
    return len(set(list(s)))

test_different_symbols_naive.py

import unittest
from different_symbols_naive import different_symbols_naive


class TestDifferentSymbolsNaive(unittest.TestCase):
    def test_1(self):
        input_string = 'cabca'
        solution = 3
        result = different_symbols_naive(input_string)
        self.assertEqual(result, solution)

    def test_2(self):
        input_string = 'aba'
        solution = 2
        result = different_symbols_naive(input_string)
        self.assertEqual(result, solution)


if __name__ == '__main__':
    unittest.main()