/in/foo.cc: In function 'int main()':
/in/foo.cc:64:9: error: expected ',' or ';' before 'if'
   64 |         if (B.contains(val))
      |         ^~
/in/foo.cc:63:13: warning: unused variable 'val' [-Wunused-variable]
   63 |         int val = A.getData(i)
      |             ^~~