View Compilation Error

0_0_29439541_10668.cpp: In function 'int main()':
0_0_29439541_10668.cpp:57:12: error: 'dfs1' was not declared in this scope
   }dfs1(1,0);dfs2(1,1);
            ^
0_0_29439541_10668.cpp:57:22: error: 'dfs2' was not declared in this scope
   }dfs1(1,0);dfs2(1,1);
                      ^