View Compilation Error

0_0_39368452_5451.cpp: In function 'void dfs_g(int)':
0_0_39368452_5451.cpp:17:17: error: 'dfs1' was not declared in this scope
   17 |                 dfs1(G[u][i]);
      |                 ^~~~
0_0_39368452_5451.cpp: In function 'void dfs_rg(int)':
0_0_39368452_5451.cpp:25:17: error: 'dfs2' was not declared in this scope
   25 |                 dfs2(rG[u][i]);
      |                 ^~~~