/in/foo.cc: In function 'int main()':
/in/foo.cc:5:21: warning: variable 'b' set but not used [-Wunused-but-set-variable]
    5 |         long long a,b,c;
      |                     ^
/in/foo.cc:5:23: warning: variable 'c' set but not used [-Wunused-but-set-variable]
    5 |         long long a,b,c;
      |                       ^