/in/foo.cc: In function 'void sort(long long int, long long int)':
/in/foo.cc:28:16: warning: unused variable 'p' [-Wunused-variable]
     ll i,j,mid,p;
                ^
/in/foo.cc: In function 'long long int check(long long int, long long int, long long int)':
/in/foo.cc:78:11: warning: unused variable 'number' [-Wunused-variable]
  ll ans=0,number=c*c;
           ^~~~~~