View Compilation Error

0_0_31037496_22861.cpp: In function 'int main()':
0_0_31037496_22861.cpp:190:18: error: too many arguments to function 'void dfs(int)'
         dfs(1, -1);
                  ^
0_0_31037496_22861.cpp:144:6: note: declared here
 void dfs(int u) {
      ^