judgeroutecircle.py

# -*- coding: utf-8 -*-
"""
Created on Wed May  9 09:55:07 2018

@author: sun_y
"""

"""
Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place. 
The move sequence is represented by a string. And each move is represent by a character. The valid robot moves are R (Right), L (Left), U (Up) and D (down). The output should be true or false representing whether the robot makes a circle. 
Example 1:
Input: "UD"
Output: true

Example 2:
Input: "LL"
Output: false
"""
class Solution:
    def judgeCircle(self, moves):
        """
        :type moves: str
        :rtype: bool
        """
        if moves.count("U")==moves.count("D") and moves.count("L")==moves.count("r"):
            return True
        else:
            return False