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LeetCode-232

题目

结果

代码

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type MyQueue struct {
stack []int
}

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

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

/** Removes the element from in front of queue and returns that element. */
func (this *MyQueue) Pop() int {
v := this.Peek()
this.stack = this.stack[1:len(this.stack)]
return v
}

/** Get the front element. */
func (this *MyQueue) Peek() int {
return this.stack[0]
}

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