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class Solution {
public:
    bool judgeCircle(string moves) {
        int dx = 0, dy = 0;
        for(int i = 0; i < moves.length(); i++) {
            if (moves[i] == 'U') {
                dy++;
            } else if (moves[i] == 'D') {
                dy--;
            } else if (moves[i] == 'R') {
                dx++;
            } else if (moves[i] == 'L') {
                dx--;
            }
        }
        return dx == 0 && dy == 0 ? true : false;
    }
};