题解

#include<iostream>
#include<stack>
using namespace std;
int main(){
    int n;
    stack<int>stk;
    cin>>n;
    for(int i=0;i<n;i++){
        int x;
        cin>>x;
        stk.push(x);
    }
    while(stk.size()){
        cout<<"=====stk.size["<<stk.size()<<"]======\n";
        cout<<"     stk.pop["<<stk.top()<<"]\n";
        stk.pop();
    }
    return 0;
}