View Compilation Error

0_0_36873156_10935.cpp: In function 'void dfs2(int, int)':
0_0_36873156_10935.cpp:42:20: error: 'tot' was not declared in this scope
  id[u] = ++cnt; rk[tot] = u;
                    ^
0_0_36873156_10935.cpp:46:27: error: 'fa' was not declared in this scope
   if (v == son[u] || v == fa[u])continue;
                           ^