Create minimum-domino-rotations-for-equal-row.py

Author: kamyu104

Python/minimum-domino-rotations-for-equal-row.py

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+# Time:  O(n)
+# Space: O(1)
+
+import itertools
+
+
+class Solution(object):
+    def minDominoRotations(self, A, B):
+        """
+        :type A: List[int]
+        :type B: List[int]
+        :rtype: int
+        """
+        intersect = reduce(set.__and__, [set(d) for d in itertools.izip(A, B)])
+        if not intersect:
+            return -1
+        x = intersect.pop()
+        return min(len(A)-A.count(x), len(B)-B.count(x))