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题解
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江千里--DC1级1班 LV 6 @ 2025-11-29 10:37:17
#include<bits/stdc++.h> using namespace std;
int main(){ char c; queue name; while(cin>>c){ if(c=='A'&&name.empty()){ cout<<"-None"<<endl; }else if(c=='A'&&!name.empty()){ cout<<"-"<<name.front()<<endl; name.pop(); } if(c=='B'){ string c; cin>>c; name.push(c); } } return 0; }
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#include<bits/stdc++.h> using namespace std;
int main(){ char c; queue name; while(cin>>c){ if(c=='A'&&name.empty()){ cout<<"-None"<<endl; }else if(c=='A'&&!name.empty()){ cout<<"-"<<name.front()<<endl; name.pop(); } if(c=='B'){ string c; cin>>c; name.push(c); } } return 0; }
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