/in/foo.cc: In function 'int main()':
/in/foo.cc:33:26: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<ans<<" "<<b<<" "<<e<<endl;;
                          ^
/in/foo.cc:33:21: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<ans<<" "<<b<<" "<<e<<endl;;
                     ^~~