View Compilation Error

0_0_37932398_9747.cpp: In function 'void ddfsc(int, int)':
0_0_37932398_9747.cpp:45:8: error: 'par' was not declared in this scope
  ddfsc(par[u],u);
        ^
0_0_37932398_9747.cpp: In function 'void solve()':
0_0_37932398_9747.cpp:61:23: error: too few arguments to function 'void ddfsa(int, int)'
   for(int u:A) ddfsa(u);
                       ^
0_0_37932398_9747.cpp:35:6: note: declared here
 void ddfsa(int u,int fa){
      ^
0_0_37932398_9747.cpp:62:23: error: too few arguments to function 'void ddfsb(int, int)'
   for(int u:B) ddfsb(u);
                       ^
0_0_37932398_9747.cpp:39:6: note: declared here
 void ddfsb(int u,int fa){
      ^
0_0_37932398_9747.cpp:63:23: error: too few arguments to function 'void ddfsc(int, int)'
   for(int u:C) ddfsc(u);
                       ^
0_0_37932398_9747.cpp:43:6: note: declared here
 void ddfsc(int u,int fa){
      ^