func judgeCircle(moves string) bool {
    xCount , yCount := 0 , 0
    countRange := func(moveOp byte){
        switch moveOp {
            case 'L':
                    xCount++
            case 'R':
                    xCount--
            case 'U':
                    yCount++
            case 'D':
                    yCount--
        }
    }

    moveCount := len(moves)
    halfMoveCount := moveCount / 2
    for i:=0 ; i < halfMoveCount ; i++{
        countRange(moves[i])
        countRange(moves[moveCount - 1 - i])
    }
    if(halfMoveCount * 2 != moveCount){
        countRange(moves[halfMoveCount])
    }
    return xCount==0 && yCount==0;
}