Create 888. Fair Candy Swap

Author: AishwaryaBarai

888. Fair Candy Swap

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+class Solution(object):
+    def fairCandySwap(self, A, B):
+        Sa, Sb = sum(A), sum(B)
+        setB = set(B)
+        for x in A:
+            if x + (Sb - Sa) / 2 in setB:
+                return [x, x + (Sb - Sa) / 2]