/in/foo.cc: In function 'void dd(int)':
/in/foo.cc:16:12: warning: unused variable 'kk' [-Wunused-variable]
  int num=0,kk=x,minn1=10,maxn1=0,minn2=10,maxn2=0,r1,r2;
            ^~
/in/foo.cc:74:3: warning: 'r2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(r2!=num)
   ^~
/in/foo.cc:57:3: warning: 'r1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(r1!=num)
   ^~