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type MyQueue struct {
    A []int
}


/** Initialize your data structure here. */
func Constructor() MyQueue {
    return MyQueue{
        A: make([]int, 0),
    }
}


/** Push element x to the back of queue. */
func (this *MyQueue) Push(x int)  {
    this.A = append(this.A, x)
}


/** Removes the element from in front of queue and returns that element. */
func (this *MyQueue) Pop() int {
    x := 0
    if len(this.A) >= 1 {
        x = this.A[0]
        this.A = this.A[1:]
    }
    return x
}


/** Get the front element. */
func (this *MyQueue) Peek() int {
    if len(this.A) >= 1 {
        return this.A[0]
    }
    return 0
}


/** Returns whether the queue is empty. */
func (this *MyQueue) Empty() bool {
    return len(this.A) == 0
}


/**
 * Your MyQueue object will be instantiated and called as such:
 * obj := Constructor();
 * obj.Push(x);
 * param_2 := obj.Pop();
 * param_3 := obj.Peek();
 * param_4 := obj.Empty();
 */