Create reverse-integer.py

Author: backendbuilderdev

reverse-integer.py

@@ -0,0 +1,35 @@
+class Solution(object):
+    def reverse(self, x):
+        """
+        :type x: int
+        :rtype: int
+        """
+        if x < 0:
+            return -self.reverse(-x)
+
+        result = 0
+        while x:
+            result = result * 10 + x % 10
+            x //= 10
+        return result if result <= 0x7fffffff else 0  # Handle overflow.
+
+    def reverse2(self, x):
+        """
+        :type x: int
+        :rtype: int
+        """
+        if x < 0:
+            x = int(str(x)[::-1][-1] + str(x)[::-1][:-1])
+        else:
+            x = int(str(x)[::-1])
+        x = 0 if abs(x) > 0x7FFFFFFF else x
+        return x
+
+    def reverse3(self, x):
+        """
+        :type x: int
+        :rtype: int
+        """
+        s = cmp(x, 0)
+        r = int(repr(s * x)[::-1])
+        return s * r * (r < 2 ** 31)