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753 B
753 B
队列跟栈一样,也是一种操作受限的线性表数据结构
用数组实现的队列叫作顺序队列,用链表实现的队列叫作链式队列。
用两个栈实现一个队列
class StackQueue {
private stack1: number[] = [];
private stack2: number[] = [];
add(value: number) {
this.stack1.push(value);
}
popup() {
if (!this.stack1.length) return;
while (this.stack1.length) {
const stackValue = this.stack1.pop();
this.stack2.push(stackValue!);
}
const popValue = this.stack2.pop();
while (this.stack2.length) {
const stackValue = this.stack2.pop();
this.stack1.push(stackValue!);
}
return popValue;
}
get length() {
return this.stack1.length;
}
}