View Compilation Error

0_0_37796247_15388.cpp: In function 'void dfs(long long int, long long int)':
0_0_37796247_15388.cpp:28:8: error: 'dep' was not declared in this scope
     ve[dep].pb(u);
        ^
0_0_37796247_15388.cpp: In function 'void solve()':
0_0_37796247_15388.cpp:109:16: error: too many arguments to function 'void dfs(long long int, long long int)'
     dfs(1, 0, 1);
                ^
0_0_37796247_15388.cpp:26:6: note: declared here
 void dfs(int u, int fa)
      ^