全部评论 2

  • 6奥

    3天前 来自 河北

    0
  • #include <bits/stdc++.h>
    using namespace std;
    stack <string> stk;
    int n,m;
    string us;
    string post;
    int main(){
    cin >> n >> m;
    int num=0;
    while (n--){
    cin >> us;
    if (us=="C"){
    cin >> post;
    stk.push(post);
    if (num>=stk.size())continue;
    num++;
    }else if (us=="Q"&&stk.empty()){
    cout << "Everyone, come and deliver it." << endl;
    }else if (us=="Q"&&stk.size()>0){
    cout << stk.top() << endl;
    stk.pop();
    num--;
    }

    }
    return 0;
    

    }

    3天前 来自 河北

    0

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