View Compilation Error

0_0_26983582_31087.cpp: In function 'void dfs(int, int, int)':
0_0_26983582_31087.cpp:37:23: error: too few arguments to function 'void dfs(int, int, int)'
         dfs(e.to,dep+1);
                       ^
0_0_26983582_31087.cpp:28:6: note: declared here
 void dfs(int u, int fa, int dep) { // 得到树的欧拉序列、深度和首位置序列
      ^
0_0_26983582_31087.cpp: In function 'void init()':
0_0_26983582_31087.cpp:67:12: error: too few arguments to function 'void dfs(int, int, int)'
     dfs(1,0);
            ^
0_0_26983582_31087.cpp:28:6: note: declared here
 void dfs(int u, int fa, int dep) { // 得到树的欧拉序列、深度和首位置序列
      ^