/in/foo.cc: In function 'int main()':
/in/foo.cc:19:33: error: unable to find numeric literal operator 'operator""\U0000ff1b'
   19 |     int new_s = total_seconds % 60；
      |                                 ^~~~
/in/foo.cc:19:33: note: use '-fext-numeric-literals' to enable more built-in suffixes
/in/foo.cc:17:9: warning: unused variable 'new_h' [-Wunused-variable]
   17 |     int new_h = total_seconds / 3600;
      |         ^~~~~
/in/foo.cc:18:9: warning: unused variable 'new_m' [-Wunused-variable]
   18 |     int new_m = (total_seconds % 3600) / 60;
      |         ^~~~~
/in/foo.cc:19:9: warning: unused variable 'new_s' [-Wunused-variable]
   19 |     int new_s = total_seconds % 60；
      |         ^~~~~