解题思路
统计R（右），L（左），U（上）和 D（下）的步数，R与L相同，U和D相同即可
代码
class Solution: def judgeCircle(self, moves: str) -> bool: hash = {i:0 for i in {"U","D","L","R"}} for i in moves: hash["%s"%i] += 1 if hash["U"]==hash["D"] and hash["L"]==hash["R"]: return True else: return False
