foo.cc:1:1: error: 'include' does not name a type
    1 | include <cstdio> include <iostream> include <cmath>
      | ^~~~~~~
foo.cc: In function 'void prep()':
foo.cc:14:1: error: 'scanf' was not declared in this scope
   14 | scanf("%d",&n);
      | ^~~~~
foo.cc: In function 'void sear()':
foo.cc:42:1: error: 'printf' was not declared in this scope
   42 | printf("%d",co);
      | ^~~~~~
foo.cc:1:1: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
  +++ |+#include <cstdio>
    1 | include <cstdio> include <iostream> include <cmath>

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