/in/foo.cc: In function 'int main()':
/in/foo.cc:18:7: warning: unused variable 'sco' [-Wunused-variable]
   18 |   int sco[1000], all = 0, a[3],n=0;
      |       ^~~
/in/foo.cc:18:18: warning: unused variable 'all' [-Wunused-variable]
   18 |   int sco[1000], all = 0, a[3],n=0;
      |                  ^~~