题目:
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.
题意:
有一个机器人从原点(0,0)的位置出发,输入一段字串(U,D,L,R),代表向上、下、左、右的移动顺序,求执行完顺序后是否能回到原点
Python 解:
思路:运用 .count(‘ ‘)函数,判断L和R,D和U的数量是否相等。
class Solution(object): def judgeCircle(self, moves): """ :type moves: str :rtype: bool """ return moves.count(‘R‘)==moves.count(‘L‘) and moves.count(‘U‘)==moves.count(‘D‘)
时间: 2024-10-09 01:24:11