addng algo

Author: ivanpenaloza

src/my_project/interviews/amazon_high_frequency_23/round_2/two_sum_round_4.py

@@ -0,0 +1,16 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+
+        answer = dict()
+
+        for k, v in enumerate(nums):
+
+            if v in answer:
+                return [answer[v], k]
+            else: 
+                answer[target - v] = k
+
+        return []

src/my_project/interviews/amazon_high_frequency_23/round_2/valid_palindrome_round_6.py

@@ -0,0 +1,23 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+import re 
+
+class Solution:
+    def isPalindrome(self, s: str) -> bool:
+
+        # To lowercase
+        s = s.lower()
+
+        # Remove non-alphanumeric characters
+        s = re.sub(pattern='[^a-zA-Z0-9]', repl='',string=s)
+
+        # Determine if it is palindrome or not
+
+        len_s = len(s)
+
+        for i in range(len_s//2):
+            
+            if s[i] != s[len_s - 1 - i]:
+                return False 
+            
+        return True

src/my_project/interviews/top_150_questions_round_21/isomorphic_strings.py

@@ -0,0 +1,7 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC,abstractmethod
+
+class Solution:
+    def isIsomorphic(self, s: str, t: str) -> bool:
+
+        return len(set(s)) == len(set(t)) == len(set(zip(s,t)))

tests/test_150_questions_round_21/test_isomorphic_strings_round_round_21.py

@@ -0,0 +1,15 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_21\
+.isomorphic_strings import Solution
+
+class IsomorphicStringsTestCase(unittest.TestCase):
+
+    def test_are_isomorphic_strings(self):
+        solution = Solution()
+        output = solution.isIsomorphic(s="egg", t="add")
+        self.assertTrue(output)
+
+    def test_are_not_isomorphic_strings(self):
+        solution = Solution()
+        output = solution.isIsomorphic(s="foo", t="bar")
+        self.assertFalse(output)