/in/foo.cc: In function 'int main()':
/in/foo.cc:7:42: error: array must be initialized with a brace-enclosed initializer
  int * partner[5000] = new int [2 * n + 1];
                                          ^
/in/foo.cc:21:16: error: invalid conversion from 'int' to 'int*' [-fpermissive]
   partner[k] = 1;
                ^
/in/foo.cc:23:19: warning: deleting array 'partner'
         delete [] partner;
                   ^~~~~~~