/in/foo.cc:1:1: error: 'include' does not name a type
 include<bits/stdc++.h>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:23: error: 'scanf' was not declared in this scope
         scanf("%d", &n);
                       ^
/in/foo.cc:11:25: error: 'printf' was not declared in this scope
          printf("%d ", b);
                         ^
/in/foo.cc:13:18: error: 'printf' was not declared in this scope
     printf("%d",a);         
                  ^