/in/foo.cc: In function 'int search(int)':
/in/foo.cc:29:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:32:5: error: 'cin' was not declared in this scope
     cin>>n>>k>>m>>bg>>ed;
     ^~~
/in/foo.cc:48:24: error: 'cout' was not declared in this scope
     if(dis[ed]!=999999)cout<<dis[ed];
                        ^~~~
/in/foo.cc:49:10: error: 'cout' was not declared in this scope
     else cout<<-1;
          ^~~~