foo.c:1:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
    1 | include <bits/stdc++.h>
      |         ^
foo.c:8:2: error: variably modified ‘q’ at file scope
    8 | }q[N];
      |  ^
foo.c: In function ‘dfs’:
foo.c:18:1: error: ‘cout’ undeclared (first use in this function)
   18 | cout<<ans<<endl;
      | ^~~~
foo.c:18:1: note: each undeclared identifier is reported only once for each function it appears in
foo.c:18:12: error: ‘endl’ undeclared (first use in this function)
   18 | cout<<ans<<endl;
      |            ^~~~
foo.c: In function ‘main’:
foo.c:26:1: error: ‘cin’ undeclared (first use in this function)
   26 | cin>>n>>a;
      | ^~~