题解 | #用两个栈实现队列#
用两个栈实现队列
http://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6
let s1 =[] let s2= []
function push(node) { // write code here s1.push(node) } function pop() { // write code here if(s2.length!=0){ return s2.pop() }else{ while(s1.length!=0){ s2.push(s1.pop()) } return s2.pop() } } module.exports = { push : push, pop : pop };
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