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try_Judge Route Circle.py
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try_Judge Route Circle.py
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"""
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
"""
return moves.count('U') == moves.count('D') and moves.count('R') == moves.count('L')
# method 2
class Solution:
def judgeCircle(self, moves):
"""
:type moves: str
:rtype: bool
"""
# return moves.count('U') == moves.count('D') and moves.count('R') == moves.count('L')
x = y = 0
for move in moves:
if move == "U":
y += 1
elif move == 'D':
y -= 1
elif move == 'R':
x += 1
elif move == 'L':
x -= 1
return x == y == 0