ac

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,a;
stack<int> sk;
signed main(){
    cin>>n;
    for(int i = 1;i<=n;i++){
        cin>>a;
        sk.push(a);
    }
    for(int i = 1;i<=n;i++){
        cout<<"=====stk.size["<<sk.size()<<"]======"<<endl;
        cout<<"     stk.pop["<<sk.top()<<"]"<<endl;
        sk.pop();
    }
    return 0;
}