运行 ID: 345032

Main.cc: In function ‘int main()’:
Main.cc:4:2: error: ‘cin’ was not declared in this scope
  cin>>n;
  ^~~
Main.cc:4:2: note: suggested alternative: ‘main’
  cin>>n;
  ^~~
  main
Main.cc:6:3: error: ‘cout’ was not declared in this scope
   cout<<"F";
   ^~~~
Main.cc:9:17: error: ‘sqrt’ was not declared in this scope
  for(int i=2;i<=sqrt(n);i++){
                 ^~~~
Main.cc:9:17: note: suggested alternative: ‘short’
  for(int i=2;i<=sqrt(n);i++){
                 ^~~~
                 short
Main.cc:11:4: error: ‘cout’ was not declared in this scope
    cout<<"F";
    ^~~~
Main.cc:15:2: error: ‘cout’ was not declared in this scope
  cout<<"Yes";
  ^~~~