/in/foo.cc: In function 'int main()':
/in/foo.cc:6:30: error: 'cib' was not declared in this scope
    6 |         for(int i=1;i<=a;i++)cib>>b[i];
      |                              ^~~
/in/foo.cc:8:32: error: 'n' was not declared in this scope
    8 |                 for(int j=1;j<=n;j++){
      |                                ^