/in/foo.cc:1:4: error: stray '#' in program
    1 |  1 #include<cstdio>
      |    ^
/in/foo.cc:1:2: error: expected unqualified-id before numeric constant
    1 |  1 #include<cstdio>
      |  ^
/in/foo.cc:3:2: error: expected unqualified-id before numeric constant
    3 |  3 using namespace std;
      |  ^
/in/foo.cc:4:2: error: expected unqualified-id before numeric constant
    4 |  4 struct node
      |  ^
/in/foo.cc:12:5: error: 'f' does not name a type
   12 | 12 }f[101];
      |     ^
/in/foo.cc:13:1: error: expected unqualified-id before numeric constant
   13 | 13
      | ^~