/in/foo.cc: In function 'int main()':
/in/foo.cc:25:10: warning: unused variable 'max' [-Wunused-variable]
  int n,i,max,x;
          ^~~
/in/foo.cc: In function 'void Insert(int, int*, int)':
/in/foo.cc:6:8: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int i,c;
        ^