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+# 3516. Find Closest Person
+
+"""
+you are given three integers represnting the positions of three people on a
+number line. 'x' is the position of person 1, 'y' is the position of person
+2, and 'z' is the position of persion 3 who does not move. both person 1 and
+person 2 move toward person 3 at the same speed. determine which person will
+reach person 3 first. return 1 if person 1 will arrive first, return 2 if
+person 2 will arrive first, and 0 if both arrive at the same time.
+"""
+
+
+class Solution(object):
+ def findClosest(self, x, y, z):
+ """
+ :type x: int
+ :type y: int
+ :type z: int
+ :rtype: int
+ """
+ a, b = abs(x - z), abs(y - z)
+ return (a != b) << (a > b)
+
+
+if __name__ == "__main__":
+ obj = Solution()
+ print(obj.findClosest(2, 7, 4))
+ print(obj.findClosest(2, 5, 6))
+ print(obj.findClosest(1, 5, 3))