657. 机器人能否返回原点

 

class Solution { public: bool judgeCircle(string moves) { int len = moves.size(); int x = 0; int y = 0; for(int i = 0; i < len; ++i) { if(moves[i] == 'U') { x++; } else if(moves[i] == 'D') { x--; } else if(moves[i] == 'L') { y++; } else if(moves[i] == 'R') { y--; } } if( (x==0) && (y==0)) { return true; } return false; } };