[yayyz] WEEK 01 solutions

contains-duplicate/yayyz.py

@@ -0,0 +1,4 @@
+class Solution:
+    def containsDuplicate(self, nums: List[int]) -> bool:
+
+        return len(nums) != len(set(nums))

two-sum/yayyz.py

@@ -0,0 +1,8 @@
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+        hashmap = {}
+        for i, num in enumerate(nums):
+            complement = target - num
+            if complement in hashmap:
+                return [hashmap[complement], i]
+            hashmap[num] = i