/in/foo.c: In function 'main':
/in/foo.c:31:6: warning: unused variable 'flag' [-Wunused-variable]
  int flag=1,count=1,sum[1]={0},cc=0,len=1;
      ^~~~
/in/foo.c:32:2: warning: 'm' is used uninitialized in this function [-Wuninitialized]
  for(i=0;i<m;i++)
  ^~~
/in/foo.c:33:6: warning: 'n' may be used uninitialized in this function [-Wmaybe-uninitialized]
      dg(count,n,m,k,sum,len+i,cc);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:33:6: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]