View Compilation Error

0_0_21466502_25441.cpp: In function 'int main()':
0_0_21466502_25441.cpp:78:17: error: too many arguments to function 'void dfs(int)'
         dfs(1,-1);
                 ^
0_0_21466502_25441.cpp:47:6: note: declared here
 void dfs(int x)
      ^