leetcode657

class Solution {
    public boolean judgeCircle(String moves) {
        int z = 0;
        int s = 0;
        for(int i=0;i<moves.length();i++){
            switch (moves.charAt(i)){
                case 'R':z--;break;
                case  'L': z++;break;
                case   'U': s--;break;
                case  'D': s++;break;
            }
        }
        if (s==0 && z==0) return true;
        return false;
    }
}