/in/foo.cc: In function 'int main()':
/in/foo.cc:13:15: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized]
   13 |         cout<<a;
      |               ^
/in/foo.cc:5:17: note: 'a' was declared here
    5 |     int n,h,g,s,a;
      |                 ^