View Compilation Error

0_0_38844787_13930.cpp:71:18: error: 'fa' has not been declared
   71 | void dfs2(int f, fa){
      |                  ^~
0_0_38844787_13930.cpp: In function 'void dfs2(int, int)':
0_0_38844787_13930.cpp:72:27: error: 'fa' was not declared in this scope; did you mean 'f'?
   72 |         qzh[id[f]]=qzh[id[fa]]+v[f];
      |                           ^~
      |                           f