class CQueue {
public:stack<int> stack1,stack2;CQueue() {//初始化栈while(!stack1.empty()){stack1.pop();}while(!stack2.empty()){stack2.pop();}}void appendTail(int value) {stack1.push(value);}int deleteHead() {if(stack2.empty()){while(!stack1.empty()){stack2.push(stack1.top());stack1.pop();}}if(stack2.empty()){   return -1;}else{int deletenumber=stack2.top();stack2.pop();return deletenumber;}}
};/*** Your CQueue object will be instantiated and called as such:* CQueue* obj = new CQueue();* obj->appendTail(value);* int param_2 = obj->deleteHead();*/