/in/foo.cc: In function 'int main()':
/in/foo.cc:5:10: error: 'std::ios' has not been declared
     std::ios::sync_with_stdio(false);
          ^~~
/in/foo.cc:6:5: error: 'cin' was not declared in this scope
     cin>>n;
     ^~~
/in/foo.cc:11:42: error: 'INT_MAX' was not declared in this scope
         for(int i=1;i<=1000000;i++) d[i]=INT_MAX;
                                          ^~~~~~~
/in/foo.cc:16:46: error: 'min' was not declared in this scope
                     d[i]=min(d[i],d[i-v[j]]+1);
                                              ^
/in/foo.cc:18:19: error: 'sort' was not declared in this scope
         sort(v,v+n);
                   ^
/in/foo.cc:24:18: error: 'INT_MAX' was not declared in this scope
         if(d[S]==INT_MAX)
                  ^~~~~~~
/in/foo.cc:25:13: error: 'cout' was not declared in this scope
             cout<<-1<<endl;
             ^~~~
/in/foo.cc:25:23: error: 'endl' was not declared in this scope
             cout<<-1<<endl;
                       ^~~~
/in/foo.cc:27:13: error: 'cout' was not declared in this scope
             cout<<tmp<<endl;
             ^~~~
/in/foo.cc:27:24: error: 'endl' was not declared in this scope
             cout<<tmp<<endl;
                        ^~~~