Create leetcode645.py

Author: yanglr

leetcode-645/leetcode645.py

@@ -0,0 +1,16 @@
+from typing import List
+
+class Solution:
+    def findErrorNums(self, nums: List[int]) -> List[int]:
+        res = list()
+        nums.sort()
+        stdList = range(1, len(nums) + 1)  # len(nums) = n
+        repeatedNum = sum(nums) - sum(set(nums))     
+        res.append(repeatedNum)
+        missingNum =  (set(stdList) - set(nums)).pop()
+        res.append(missingNum)
+        return res
+        
+# below is testing        
+sol = Solution()
+print(sol.findErrorNums([4,2, 1,2]))