/in/foo.cc: In function 'int main()':
/in/foo.cc:5:23: warning: unused variable 'g' [-Wunused-variable]
    5 |         int n,k,cnt=0,g,s,b;
      |                       ^
/in/foo.cc:5:25: warning: unused variable 's' [-Wunused-variable]
    5 |         int n,k,cnt=0,g,s,b;
      |                         ^
/in/foo.cc:5:27: warning: unused variable 'b' [-Wunused-variable]
    5 |         int n,k,cnt=0,g,s,b;
      |                           ^