View Compilation Error

0_0_21807895_6321.cpp: In function 'void dfs(int, int, int)':
0_0_21807895_6321.cpp:31:31: error: too few arguments to function 'void dfs(int, int, int)'
                 dfs(i, num + 1);
                               ^
0_0_21807895_6321.cpp:25:6: note: declared here
 void dfs(int u, int num, int val)
      ^