View Compilation Error

0_0_18957031_23986.cpp: In function 'int main()':
0_0_18957031_23986.cpp:9:11: error: 'cin' was not declared in this scope
     while(cin>>T&&T)
           ^
0_0_18957031_23986.cpp:19:38: error: 'cout' was not declared in this scope
         if(all.size()-lose.size()==1)cout<<"Yes"<<endl;  //若有一人则为冠军
                                      ^
0_0_18957031_23986.cpp:19:51: error: 'endl' was not declared in this scope
         if(all.size()-lose.size()==1)cout<<"Yes"<<endl;  //若有一人则为冠军
                                                   ^
0_0_18957031_23986.cpp:21:9: error: 'cout' was not declared in this scope
         cout<<"No"<<endl;
         ^
0_0_18957031_23986.cpp:21:21: error: 'endl' was not declared in this scope
         cout<<"No"<<endl;
                     ^