/in/foo.cc: In function 'void xiugaileft(long long int, long long int)':
/in/foo.cc:11:6: warning: unused variable 'tmp' [-Wunused-variable]
  int tmp=u;
      ^~~
/in/foo.cc: In function 'void xiugairight(long long int, long long int)':
/in/foo.cc:20:6: warning: unused variable 'tmp' [-Wunused-variable]
  int tmp=u;
      ^~~
/in/foo.cc: In function 'long long int answerleft(long long int)':
/in/foo.cc:29:6: warning: unused variable 'ans1' [-Wunused-variable]
  int ans1=0,ans2=0;
      ^~~~
/in/foo.cc: In function 'long long int answerright(long long int)':
/in/foo.cc:38:6: warning: unused variable 'ans1' [-Wunused-variable]
  int ans1=0,ans2=0;
      ^~~~