/in/foo.cc:1:1: error: expected declaration before '}' token
    1 | }
      | ^
/in/foo.cc:4:5: error: expected unqualified-id before 'for'
    4 |     for (int i = 1; i <= n; i++) {
      |     ^~~
/in/foo.cc:4:21: error: 'i' does not name a type
    4 |     for (int i = 1; i <= n; i++) {
      |                     ^
/in/foo.cc:4:29: error: 'i' does not name a type
    4 |     for (int i = 1; i <= n; i++) {
      |                             ^
/in/foo.cc:7:5: error: expected unqualified-id before 'for'
    7 |     for (int i = 1; i <= n; i++) {
      |     ^~~
/in/foo.cc:7:21: error: 'i' does not name a type
    7 |     for (int i = 1; i <= n; i++) {
      |                     ^
/in/foo.cc:7:29: error: 'i' does not name a type
    7 |     for (int i = 1; i <= n; i++) {
      |                             ^
/in/foo.cc:12:5: error: expected unqualified-id before 'for'
   12 |     for (int i = 0; i < 20; i++) {
      |     ^~~
/in/foo.cc:12:21: error: 'i' does not name a type
   12 |     for (int i = 0; i < 20; i++) {
      |                     ^
/in/foo.cc:12:29: error: 'i' does not name a type
   12 |     for (int i = 0; i < 20; i++) {
      |                             ^
/in/foo.cc:15:5: error: 'depth' does not name a type
   15 |     depth[0] = -1;
      |     ^~~~~
/in/foo.cc:16:8: error: expected constructor, destructor, or type conversion before '(' token
   16 |     dfs(1, 0);
      |        ^
/in/foo.cc:19:5: error: expected unqualified-id before 'for'
   19 |     for (int i = 0; i < m; i++) {
      |     ^~~
/in/foo.cc:19:21: error: 'i' does not name a type
   19 |     for (int i = 0; i < m; i++) {
      |                     ^
/in/foo.cc:19:28: error: 'i' does not name a type
   19 |     for (int i = 0; i < m; i++) {
      |                            ^
/in/foo.cc:34:5: error: expected unqualified-id before 'return'
   34 |     return 0;
      |     ^~~~~~
/in/foo.cc:35:1: error: expected declaration before '}' token
   35 | }
      | ^