/in/foo.cc: In function 'int quik_sort(edge*, int, int)':
/in/foo.cc:100:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:124:24: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long unsigned int*' [-Wformat=]
   scanf("%d",&clsn[i].c);
                        ^
/in/foo.cc:166:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long unsigned int' [-Wformat=]
   printf("%d\n",clsn[i].c);
                          ^
/in/foo.cc:105:12: warning: unused variable 'l' [-Wunused-variable]
  int i,j,k,l;
            ^