/in/foo.cc: In function 'int main()':
/in/foo.cc:22:2: error: expected ';' before 'for'
  for(int i=0;i<n;i++){
  ^~~
/in/foo.cc:22:14: error: 'i' was not declared in this scope
  for(int i=0;i<n;i++){
              ^
/in/foo.cc: In function 'int Insert(int*, int, int)':
/in/foo.cc:13:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^