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implement-queue-using-stacks.go
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implement-queue-using-stacks.go
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package main
type MyQueue struct {
stackLeft []int
stackRight []int
}
func Constructor() MyQueue {
return MyQueue{[]int{}, []int{}}
}
func (this *MyQueue) Push(x int) {
this.stackLeft = append(this.stackLeft, x)
}
func (this *MyQueue) Pop() int {
for len(this.stackLeft) != 0 {
this.stackRight = append(this.stackRight, this.stackLeft[len(this.stackLeft)-1])
this.stackLeft = this.stackLeft[0 : len(this.stackLeft)-1]
}
result := this.stackRight[len(this.stackRight)-1]
this.stackRight = this.stackRight[0 : len(this.stackRight)-1]
for len(this.stackRight) != 0 {
this.stackLeft = append(this.stackLeft, this.stackRight[len(this.stackRight)-1])
this.stackRight = this.stackRight[0 : len(this.stackRight)-1]
}
return result
}
func (this *MyQueue) Peek() int {
return this.stackLeft[0]
}
func (this *MyQueue) Empty() bool {
return len(this.stackLeft) == 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();
*/