/in/foo.cc:20:14: error: stray '\357' in program
  for(int j=1;（1<<j）<=n;j++)
              ^
/in/foo.cc:20:15: error: stray '\274' in program
  for(int j=1;（1<<j）<=n;j++)
               ^
/in/foo.cc:20:16: error: stray '\210' in program
  for(int j=1;（1<<j）<=n;j++)
                ^
/in/foo.cc:20:21: error: stray '\357' in program
  for(int j=1;（1<<j）<=n;j++)
                     ^
/in/foo.cc:20:22: error: stray '\274' in program
  for(int j=1;（1<<j）<=n;j++)
                      ^
/in/foo.cc:20:23: error: stray '\211' in program
  for(int j=1;（1<<j）<=n;j++)
                       ^