class queue :
    
    def __init__(self,size) :
        self.__size = size
        self.__data = [0]*size
        self.__front = -1
        self.__rear = -1
    
    def isEmpty(self) :
        return self.__front == -1
    
    def isFull(self) :
        return (self.__rear + 1)%(self.__size) == self.__front
    
    def enqueue(self, value) :
        if self.isFull() :
            print("Queue is Full!!")
            return
        
        if self.isEmpty() :
            self.__front = 0
        
        self.__rear = (self.__rear + 1) % self.__size
        self.__data[self.__rear] = value
        print("삽입 완료")

    def dequeue(self) :
        if self.isEmpty() :
            print("Queue is Empty!")
            return -1

        value = self.__data[self.__front]
        
        if self.__front == self.__rear :
            self.__front = -1
            self.__rear = -1
        else :
            self.__front = (self.__front + 1) % self.__size
        
        print(value)
        
        return value

    def peek(self) :
        if self.isEmpty() :
            print("Queue is Empty!")
            return -1

        value = self.__data[self.__front]
        
        print(value)
        
        return value
    
    def info(self) :
        if self.isEmpty() :
            print("Queue is Empty!, Max Size is : {0}".format(self.__size))
            return
        
        i = self.__front
        result = "Queue List : [ "
        while True:
                result += str(self.__data[i])
                if i == self.__rear :
                    result += " ]"
                    break
                
                result += ", "
                i = (i + 1) % self.__size
        
        print("Max Size is : {0}".format(self.__size))
        print(result)

q = queue(int(input("원형큐의 최대사이즈를 입력해주세요 : ")))

endFlag = True

while endFlag :
    opcode = input("명령어 목록 : enqueue [num] | dequeue | peek | info | exit\n")
    
    if "enqueue" in opcode :
        if opcode.split()[0] != "enqueue" :
            print("제대로 입력해주세요 enqueue와 정수를 입력받습니다.")
            continue
        q.enqueue(int(opcode.split()[1]))
    elif opcode == "dequeue" :
        q.dequeue()
    elif opcode == "peek" :
        q.peek()
    elif opcode == "info" :
        q.info()
    elif opcode == "exit" :
        endFlag = False
        print("Exit")
    else :
        print("제대로 입력해주세요")