View Compilation Error

0_0_25859156_8741.cpp: In function 'int main()':
0_0_25859156_8741.cpp:50:30: error: 'i' was not declared in this scope
                         for (i = h[now]; i; i = e[i].nxt)
                              ^
0_0_25859156_8741.cpp:53:68: error: 'to_com' was not declared in this scope
                                 int to_ca = ca + (!comp[now].count(to_com));
                                                                    ^