/in/foo.cc: In function 'int main()':
/in/foo.cc:46:16: error: expected ';' before 'ans'
   46 |         (nt!=1) ans++;
      |                ^~~~
      |                ;
/in/foo.cc:46:12: warning: statement has no effect [-Wunused-value]
   46 |         (nt!=1) ans++;
      |         ~~~^~~~